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HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT 230529 - 1 East Fairmont Middle School

SECTION 230529 - HANGERS AND SUPPORTS FOR HVAC PIPING AND EQUIPMENT

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Metal pipe hangers and supports. 2. Trapeze pipe hangers. 3. Thermal-hanger shield inserts. 4. Fastener systems. 5. Pipe positioning systems. 6. Equipment supports.

1.2 PERFORMANCE REQUIREMENTS

A. Structural Performance: Hangers and supports for piping and equipment shall withstand the effects of gravity loads and stresses within limits and under conditions indicated according to ASCE/SEI 7.

1. Design supports for multiple pipes capable of supporting combined weight of supported systems, system contents, and test water.

2. Design equipment supports capable of supporting combined operating weight of supported equipment and connected systems and components.

1.3 SUBMITTALS

A. Product Data: For each type of product indicated.

B. Welding certificates.

1.4 QUALITY ASSURANCE

A. Structural Steel Welding Qualifications: Qualify procedures and personnel according to AWS D1.1/D1.1M, "Structural Welding Code - Steel."

B. Pipe Welding Qualifications: Qualify procedures and operators according to ASME Boiler and Pressure Vessel Code.


PART 2 - PRODUCTS

2.1 METAL PIPE HANGERS AND SUPPORTS

A. Carbon-Steel Pipe Hangers and Supports:

1. Description: MSS SP-58, Types 1 through 58, factory-fabricated components.

2. Galvanized Metallic Coatings: Pregalvanized or hot dipped. 3. Nonmetallic Coatings: Plastic coating, jacket, or liner. 4. Padded Hangers: Hanger with fiberglass or other pipe insulation pad or

cushion to support bearing surface of piping. 5. Hanger Rods: Continuous-thread rod, nuts, and washer.

B. Copper Pipe Hangers:

1. Description: MSS SP-58, Types 1 through 58, copper-coated-steel, factory-fabricated components.

2. Hanger Rods: Continuous-thread rod, nuts, and washer made of copper-coated steel.

2.2 TRAPEZE PIPE HANGERS

A. Description: MSS SP-69, Type 59, shop- or field-fabricated pipe-support assembly made from structural carbon-steel shapes with MSS SP-58 carbon-steel hanger rods, nuts, saddles, and U-bolts.

2.3 THERMAL-HANGER SHIELD INSERTS

A. Insulation-Insert Material for Cold Piping: ASTM C 552, Type II cellular glass with 100-psig or ASTM C 591, Type VI, Grade 1 polyisocyanurate with 125-psig minimum compressive strength and vapor barrier.

B. Insulation-Insert Material for Hot Piping: Water-repellent treated, ASTM C 533, Type I calcium silicate with 100-psig, ASTM C 552, Type II cellular glass with 100-psig or ASTM C 591, Type VI, Grade 1 polyisocyanurate with 125-psig minimum compressive strength.

C. For Trapeze or Clamped Systems: Insert and shield shall cover entire circumference of pipe.

D. For Clevis or Band Hangers: Insert and shield shall cover lower 180 degrees of pipe.


E. Insert Length: Extend 2 inches beyond sheet metal shield for piping operating below ambient air temperature.

2.4 FASTENER SYSTEMS

A. Powder-Actuated Fasteners: Threaded-steel stud, for use in hardened portland cement concrete with pull-out, tension, and shear capacities appropriate for supported loads and building materials where used.

B. Mechanical-Expansion Anchors: Insert-wedge-type, zinc-coated or stainless- steel anchors, for use in hardened portland cement concrete; with pull-out, tension, and shear capacities appropriate for supported loads and building materials where used.

2.5 EQUIPMENT SUPPORTS

A. Description: Welded, shop- or field-fabricated equipment support made from structural carbon-steel shapes.

2.6 MISCELLANEOUS MATERIALS

A. Structural Steel: ASTM A 36/A 36M, carbon-steel plates, shapes, and bars; black and galvanized.

B. Grout: ASTM C 1107, factory-mixed and -packaged, dry, hydraulic-cement, nonshrink and nonmetallic grout; suitable for interior and exterior applications.

1. Properties: Nonstaining, noncorrosive, and nongaseous. 2. Design Mix: 5000-psi, 28-day compressive strength.

PART 3 - EXECUTION

3.1 HANGER AND SUPPORT INSTALLATION

A. Metal Pipe-Hanger Installation: Comply with MSS SP-69 and MSS SP-89. Install hangers, supports, clamps, and attachments as required to properly support piping from the building structure.

B. Metal Trapeze Pipe-Hanger Installation: Comply with MSS SP-69 and MSS SP-89. Arrange for grouping of parallel runs of horizontal piping, and support together on field-fabricated trapeze pipe hangers.


1. Pipes of Various Sizes: Support together and space trapezes for smallest pipe size or install intermediate supports for smaller diameter pipes as specified for individual pipe hangers.

2. Field fabricate from ASTM A 36/A 36M, carbon-steel shapes selected for loads being supported. Weld steel according to AWS D1.1/D1.1M.

C. Thermal-Hanger Shield Installation: Install in pipe hanger or shield for insulated piping.

D. Fastener System Installation:

1. Install powder-actuated fasteners for use in lightweight concrete or concrete slabs less than 4 inches thick in concrete after concrete is placed and completely cured. Use operators that are licensed by powder-actuated tool manufacturer. Install fasteners according to powder-actuated tool manufacturer's operating manual.

2. Install mechanical-expansion anchors in concrete after concrete is placed and completely cured. Install fasteners according to manufacturer's written instructions.

E. Install hangers and supports complete with necessary attachments, inserts, bolts, rods, nuts, washers, and other accessories.

F. Equipment Support Installation: Fabricate from welded-structural-steel shapes.

G. Install hangers and supports to allow controlled thermal and seismic movement of piping systems, to permit freedom of movement between pipe anchors, and to facilitate action of expansion joints, expansion loops, expansion bends, and similar units.

H. Install lateral bracing with pipe hangers and supports to prevent swaying.

I. Install building attachments within concrete slabs or attach to structural steel. Install additional attachments at concentrated loads, including valves, flanges, and strainers, NPS 2-1/2 and larger and at changes in direction of piping. Install concrete inserts before concrete is placed; fasten inserts to forms and install reinforcing bars through openings at top of inserts.

J. Load Distribution: Install hangers and supports so that piping live and dead loads and stresses from movement will not be transmitted to connected equipment.

K. Pipe Slopes: Install hangers and supports to provide indicated pipe slopes and to not exceed maximum pipe deflections allowed by ASME B31.9 for building services piping.

L. Insulated Piping:


1. Attach clamps and spacers to piping.

a. Piping Operating above Ambient Air Temperature: Clamp may project through insulation.

b. Piping Operating below Ambient Air Temperature: Use thermal-hanger shield insert with clamp sized to match OD of insert.

c. Do not exceed pipe stress limits allowed by ASME B31.9 for building services piping.

2. Install MSS SP-58, Type 39, protection saddles if insulation without vapor barrier is indicated. Fill interior voids with insulation that matches adjoining insulation.

a. Option: Thermal-hanger shield inserts may be used. Include steel weight-distribution plate for pipe NPS 4 and larger if pipe is installed on rollers.

3. Install MSS SP-58, Type 40, protective shields on cold piping with vapor barrier. Shields shall span an arc of 180 degrees.

a. Option: Thermal-hanger shield inserts may be used. Include steel weight-distribution plate for pipe NPS 4 and larger if pipe is installed on rollers.

4. Shield Dimensions for Pipe: Not less than the following:

a. NPS 1/4 to NPS 3-1/2: 12 inches long and 0.048 inch thick. b. NPS 4: 12 inches long and 0.06 inch thick. c. NPS 5 and NPS 6: 18 inches long and 0.06 inch thick. d. NPS 8 to NPS 14: 24 inches long and 0.075 inch thick. e. NPS 16 to NPS 24: 24 inches long and 0.105 inch thick.

5. Pipes NPS 8 and Larger: Include wood or reinforced calcium-silicate-insulation inserts of length at least as long as protective shield.

6. Thermal-Hanger Shields: Install with insulation same thickness as piping insulation.

3.2 EQUIPMENT SUPPORTS

A. Fabricate structural-steel stands to suspend equipment from structure overhead or to support equipment above floor.

B. Grouting: Place grout under supports for equipment and make bearing surface smooth.

C. Provide lateral bracing, to prevent swaying, for equipment supports.


3.3 METAL FABRICATIONS

A. Cut, drill, and fit miscellaneous metal fabrications for trapeze pipe hangers and equipment supports.

B. Fit exposed connections together to form hairline joints. Field weld connections that cannot be shop welded because of shipping size limitations.

C. Field Welding: Comply with AWS D1.1/D1.1M procedures for shielded, metal arc welding; appearance and quality of welds; and methods used in correcting welding work; and with the following:

1. Use materials and methods that minimize distortion and develop strength and corrosion resistance of base metals.

2. Obtain fusion without undercut or overlap. 3. Remove welding flux immediately. 4. Finish welds at exposed connections so no roughness shows after

finishing and so contours of welded surfaces match adjacent contours.

3.4 ADJUSTING

A. Hanger Adjustments: Adjust hangers to distribute loads equally on attachments and to achieve indicated slope of pipe.

B. Trim excess length of continuous-thread hanger and support rods to 1-1/2 inches.

3.5 PAINTING

A. Touchup: Clean field welds and abraded areas of shop paint. Paint exposed areas immediately after erecting hangers and supports. Use same materials as used for shop painting. Comply with SSPC-PA 1 requirements for touching up field-painted surfaces.

1. Apply paint by brush or spray to provide a minimum dry film thickness of 2.0 mils.

B. Galvanized Surfaces: Clean welds, bolted connections, and abraded areas and apply galvanizing-repair paint to comply with ASTM A 780.

3.6 HANGER AND SUPPORT SCHEDULE

A. Specific hanger and support requirements are in Sections specifying piping systems and equipment.


B. Comply with MSS SP-69 for pipe-hanger selections and applications that are not specified in piping system Sections.

C. Use hangers and supports with galvanized metallic coatings for piping and equipment that will not have field-applied finish.

D. Use nonmetallic coatings on attachments for electrolytic protection where attachments are in direct contact with copper tubing.

E. Use carbon-steel pipe hangers and supports and metal trapeze pipe hangers and attachments for general service applications.

F. Use stainless-steel pipe hangers and stainless-steel or corrosion-resistant attachments for hostile environment applications.

G. Use copper-plated pipe hangers and copper or stainless-steel attachments for copper piping and tubing.

H. Use padded hangers for piping that is subject to scratching.

I. Use thermal-hanger shield inserts for insulated piping and tubing.

J. Horizontal-Piping Hangers and Supports: Unless otherwise indicated and except as specified in piping system Sections, install the following types:

1. Adjustable, Steel Clevis Hangers (MSS Type 1): For suspension of noninsulated or insulated, stationary pipes NPS 1/2 to NPS 30.

2. Yoke-Type Pipe Clamps (MSS Type 2): For suspension of up to 1050 deg F, pipes NPS 4 to NPS 24, requiring up to 4 inches of insulation.

3. Carbon- or Alloy-Steel, Double-Bolt Pipe Clamps (MSS Type 3): For suspension of pipes NPS 3/4 to NPS 36, requiring clamp flexibility and up to 4 inches of insulation.

4. Adjustable, Steel Band Hangers (MSS Type 7): For suspension of noninsulated, stationary pipes NPS 1/2 to NPS 8.

5. U-Bolts (MSS Type 24): For support of heavy pipes NPS 1/2 to NPS 30. 6. Pipe Saddle Supports (MSS Type 36): For support of pipes NPS 4 to

NPS 36, with steel-pipe base stanchion support and cast-iron floor flange or carbon-steel plate.

7. Pipe Stanchion Saddles (MSS Type 37): For support of pipes NPS 4 to NPS 36, with steel-pipe base stanchion support and cast-iron floor flange or carbon-steel plate, and with U-bolt to retain pipe.

8. Single-Pipe Rolls (MSS Type 41): For suspension of pipes NPS 1 to NPS 30, from two rods if longitudinal movement caused by expansion and contraction might occur.

9. Complete Pipe Rolls (MSS Type 44): For support of pipes NPS 2 to NPS 42 if longitudinal movement caused by expansion and contraction might occur but vertical adjustment is not necessary.


K. Vertical-Piping Clamps: Unless otherwise indicated and except as specified in piping system Sections, install the following types:

1. Extension Pipe or Riser Clamps (MSS Type 8): For support of pipe risers NPS 3/4 to NPS 24.

2. Carbon- or Alloy-Steel Riser Clamps (MSS Type 42): For support of pipe risers NPS 3/4 to NPS 24 if longer ends are required for riser clamps.

L. Hanger-Rod Attachments: Unless otherwise indicated and except as specified in piping system Sections, install the following types:

1. Steel Turnbuckles (MSS Type 13): For adjustment up to 6 inches for heavy loads.

2. Steel Clevises (MSS Type 14): For 120 to 450 deg F piping installations.

M. Building Attachments: Unless otherwise indicated and except as specified in piping system Sections, install the following types:

1. Steel or Malleable Concrete Inserts (MSS Type 18): For upper attachment to suspend pipe hangers from concrete ceiling.

2. Top-Beam C-Clamps (MSS Type 19): For use under roof installations with bar-joist construction, to attach to top flange of structural shape.

3. Side-Beam or Channel Clamps (MSS Type 20): For attaching to bottom flange of beams, channels, or angles.

4. Center-Beam Clamps (MSS Type 21): For attaching to center of bottom flange of beams.

5. Welded Beam Attachments (MSS Type 22): For attaching to bottom of beams if loads are considerable and rod sizes are large.

6. C-Clamps (MSS Type 23): For structural shapes. 7. Welded-Steel Brackets: For support of pipes from below, or for

suspending from above by using clip and rod. Use one of the following for indicated loads:

a. Light (MSS Type 31): 750 lb. b. Medium (MSS Type 32): 1500 lb. c. Heavy (MSS Type 33): 3000 lb.

8. Side-Beam Brackets (MSS Type 34): For sides of steel or wooden beams.

9. Plate Lugs (MSS Type 57): For attaching to steel beams if flexibility at beam is required.

N. Saddles and Shields: Unless otherwise indicated and except as specified in piping system Sections, install the following types:

1. Steel-Pipe-Covering Protection Saddles (MSS Type 39): To fill interior voids with insulation that matches adjoining insulation.


2. Protection Shields (MSS Type 40): Of length recommended in writing by manufacturer to prevent crushing insulation.

3. Thermal-Hanger Shield Inserts: For supporting insulated pipe.

O. Spring Hangers and Supports: Unless otherwise indicated and except as specified in piping system Sections, install the following types:

1. Spring Cushions (MSS Type 48): For light loads if vertical movement does not exceed 1-1/4 inches.

2. Spring-Cushion Roll Hangers (MSS Type 49): For equipping Type 41, roll hanger with springs.

3. Variable-Spring Base Supports (MSS Type 52): Preset to indicated load and limit variability factor to 25 percent to allow expansion and contraction of piping system from base support.

P. Comply with MSS SP-69 for trapeze pipe-hanger selections and applications that are not specified in piping system Sections.

Q. Use powder-actuated fasteners or mechanical-expansion anchors instead of building attachments where required in concrete construction.

END OF SECTION 230529

IDENTIFICATION FOR HVAC PIPING AND EQUIPMENT 230553 - 1 East Fairmont Middle School

SECTION 230553 - IDENTIFICATION FOR HVAC PIPING AND EQUIPMENT

PART 1 - GENERAL

1.1 SUMMARY


1. Equipment labels. 2. Duct labels.

1.2 SUBMITTAL


PART 2 - PRODUCTS

2.1 EQUIPMENT LABELS

A. Plastic Labels for Equipment:

1. Material and Thickness: Multilayer, multicolor, plastic labels for mechanical engraving, and having predrilled holes for attachment hardware.

2. Maximum Temperature: Able to withstand temperatures up to 160 deg F. 3. Minimum Label Size: Length and width vary for required label content, but

not less than 2-1/2 by 3/4 inch. 4. Minimum Letter Size: 1/4 inch for name of units if viewing distance is less

than 24 inches, 1/2 inch for viewing distances up to 72 inches, and proportionately larger lettering for greater viewing distances. Include secondary lettering two-thirds to three-fourths the size of principal lettering.

5. Adhesive: Contact-type permanent adhesive, compatible with label and with substrate.

B. Label Content: Include equipment's Drawing designation or unique equipment number, Drawing numbers where equipment is indicated (plans, details, and schedules), plus the Specification Section number and title where equipment is specified.

C. Equipment Label Schedule: For each item of equipment to be labeled, on 8-1/2-by-11-inch bond paper. Tabulate equipment identification number and


identify Drawing numbers where equipment is indicated (plans, details, and schedules), plus the Specification Section number and title where equipment is specified. Equipment schedule shall be included in operation and maintenance data.

2.2 DUCT LABELS

A. Material and Thickness: Multilayer, multicolor, plastic labels for mechanical engraving and having predrilled holes for attachment hardware.

B. Maximum Temperature: Able to withstand temperatures up to 160 deg F.

C. Minimum Label Size: Length and width vary for required label content, but not less than 2-1/2 by 3/4 inch.

D. Minimum Letter Size: 1/4 inch for name of units if viewing distance is less than 24 inches, 1/2 inch for viewing distances up to 72 inches, and proportionately larger lettering for greater viewing distances. Include secondary lettering two-thirds to three-fourths the size of principal lettering.

E. Adhesive: Contact-type permanent adhesive, compatible with label and with substrate.

F. Duct Label Contents: Include identification of duct service using same designations or abbreviations as used on Drawings, duct size, and an arrow indicating flow direction.

1. Flow-Direction Arrows: Integral with duct system service lettering to accommodate both directions, or as separate unit on each duct label to indicate flow direction.

2. Lettering Size: At least 1-1/2 inches high.

PART 3 - EXECUTION

3.1 PREPARATION

A. Clean piping and equipment surfaces of substances that could impair bond of identification devices, including dirt, oil, grease, release agents, and incompatible primers, paints, and encapsulants.

3.2 EQUIPMENT LABEL INSTALLATION

A. Install or permanently fasten labels on each major item of mechanical equipment.


B. Locate equipment labels where accessible and visible.

3.3 DUCT LABEL INSTALLATION

A. Install self-adhesive duct labels with permanent adhesive on air ducts:

B. Locate labels near points where ducts enter into concealed spaces and at maximum intervals of 50 feet in each space where ducts are exposed or concealed by removable ceiling system.


TESTING, ADJUSTING, AND BALANCING 230593- 1

East Fairmont Middle School

SECTION 230593 - TESTING, ADJUSTING, AND BALANCING

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Testing, balancing and adjusting will be performed by Owner’s TAB contractor under separate contract with Owner. HVAC Contractor shall provide operation of HVAC equipment and control systems as required for the TAB Contractor to perform the TAB services.

B. This Section includes testing, adjusting, and balancing HVAC systems to produce design objectives, including the following:

1. Balancing airflow and water flow within distribution systems, including submains, branches, and terminals, to indicated quantities according to specified tolerances.

2. Adjusting total HVAC systems to provide indicated quantities. 3. Measuring electrical performance of HVAC equipment. 4. Setting quantitative performance of HVAC equipment. 5. Verifying that automatic control devices are functioning properly. 6. Reporting results of the activities and procedures specified in this Section.

C. Related Sections include the following:

1. Testing and adjusting requirements unique to particular systems and equipment are included in the Sections that specify those systems and equipment.

2. Field quality-control testing to verify that workmanship quality for system and equipment installation is specified in system and equipment Sections.

1.3 DEFINITIONS

A. Adjust: To regulate fluid flow rate and air patterns at the terminal equipment, such as to reduce fan speed or adjust a damper.

B. Balance: To proportion flows within the distribution system, including submains, branches, and terminals, according to design quantities.



C. Report Forms: Test data sheets for recording test data in logical order.

D. System Effect: A phenomenon that can create undesired or unpredicted conditions that cause reduced capacities in all or part of a system.

E. System Effect Factors: Allowances used to calculate a reduction of the performance ratings of a fan when installed under conditions different from those presented when the fan was performance tested.

F. Terminal: A point where the controlled medium, such as fluid or energy, enters or leaves the distribution system.

G. Test: A procedure to determine quantitative performance of a system or equipment.

H. Testing, Adjusting, and Balancing Agent: The entity responsible for performing and reporting the testing, adjusting, and balancing procedures.

I. AABC: Associated Air Balance Council.

J. AMCA: Air Movement and Control Association.

K. NEBB: National Environmental Balancing Bureau.

L. SMACNA: Sheet Metal and Air Conditioning Contractors' National Association.

1.4 SUBMITTALS

A. Quality-Assurance Submittals: Within 30 days from the Contractor's Notice to Proceed, submit 2 copies of evidence that the testing, adjusting, and balancing Agent and this Project's testing, adjusting, and balancing team members meet the qualifications specified in the "Quality Assurance" Article below.

B. Certified Testing, Adjusting, and Balancing Reports: Submit 2 copies of reports prepared, as specified in this Section, on approved forms certified by the testing, adjusting, and balancing Agent.


A. Agent Qualifications: Engage a testing, adjusting, and balancing agent certified by either AABC or NEBB.

B. Certification of Testing, Adjusting, and Balancing Reports: Certify the testing, adjusting, and balancing field data reports. This certification includes the following:



1. Review field data reports to validate accuracy of data and to prepare certified testing, adjusting, and balancing reports.

2. Certify that the testing, adjusting, and balancing team complied with the approved testing, adjusting, and balancing plan and the procedures specified and referenced in this Specification.

C. Testing, Adjusting, and Balancing Reports: Use standard forms from AABC's "National Standards for Testing, Adjusting, and Balancing."

D. Testing, Adjusting, and Balancing Reports: Use standard forms from NEBB's "Procedural Standards for Testing, Adjusting, and Balancing of Environmental Systems."

E. Instrumentation Type, Quantity, and Accuracy: As described in AABC national standards.

F. Instrumentation Type, Quantity, and Accuracy: As described in NEBB's "Procedural Standards for Testing, Adjusting, and Balancing of Environmental Systems," Section II, "Required Instrumentation for NEBB Certification."

G. Instrumentation Calibration: Calibrate instruments at least every 6 months or more frequently if required by the instrument manufacturer.

1.6 COORDINATION

A. Coordinate the efforts of factory-authorized service representatives for systems and equipment, HVAC controls installers, and other mechanics to operate HVAC systems and equipment to support and assist testing, adjusting, and balancing activities.

B. Notice: Provide 7 days' advance notice for each test. Include scheduled test dates and times.

C. Perform testing, adjusting, and balancing after leakage and pressure tests on air and water distribution systems have been satisfactorily completed.

PART 2 - PRODUCTS (Not Applicable)

PART 3 - EXECUTION

3.1 EXAMINATION



A. Examine Contract Documents to become familiar with project requirements and to discover conditions in systems' designs that may preclude proper testing, adjusting, and balancing of systems and equipment.

1. Contract Documents are defined in the General and Supplementary Conditions of the Contract.

2. Verify that balancing devices, such as test ports, gage cocks, thermometer

wells, flow-control devices, balancing valves and fittings, and manual volume dampers, are required by the Contract Documents. Verify that quantities and locations of these balancing devices are accessible and appropriate for effective balancing and for efficient system and equipment operation.

B. Examine approved submittal data of HVAC systems and equipment.

C. Examine project record documents described in Division 1 Section "Project Record Documents."

D. Examine Architect's and Engineer's design data, including HVAC system descriptions, statements of design assumptions for environmental conditions and systems' output, and statements of philosophies and assumptions about HVAC system and equipment controls.

E. Examine equipment performance data, including fan and pump curves. Relate performance data to project conditions and requirements, including system effects that can create undesired or unpredicted conditions that cause reduced capacities in all or part of a system.

F. Examine system and equipment installations to verify that they are complete and that testing, cleaning, adjusting, and commissioning specified in individual Specification Sections have been performed.

G. Examine system and equipment test reports.

H. Examine HVAC system and equipment installations to verify that indicated balancing devices, such as test ports, gage cocks, thermometer wells, flow-control devices, balancing valves and fittings, and manual volume dampers, are properly installed, and their locations are accessible and appropriate for effective balancing and for efficient system and equipment operation.

I. Examine systems for functional deficiencies that cannot be corrected by adjusting and balancing.

J. Examine air-handling equipment to ensure clean filters have been installed, bearings are greased, belts are aligned and tight, and equipment with functioning controls is ready for operation.



K. Examine equipment for installation and for properly operating safety interlocks and controls.

L. Report deficiencies discovered before and during performance of testing, adjusting, and balancing procedures.

3.2 PREPARATION

A. Prepare a testing, adjusting, and balancing plan that includes strategies and step-by-step procedures.

B. Complete system readiness checks and prepare system readiness reports. Verify the following:

1. Permanent electrical power wiring is complete. 2. Hydronic systems are filled, clean, and free of air. 3. Automatic temperature-control systems are operational. 4. Equipment and duct access doors are securely closed. 5. Balance, smoke, and fire dampers are open. 6. Isolating and balancing valves are open and control valves are

operational. 7. Ceilings are installed in critical areas where air-pattern adjustments are

required and access to balancing devices is provided. 8. Windows and doors can be closed so design conditions for system

operations can be met.

3.3 GENERAL TESTING AND BALANCING PROCEDURES

A. Perform testing and balancing procedures on each system according to the procedures contained in AABC national standards and this Section.

B. Perform testing and balancing procedures on each system according to the procedures contained in NEBB's "Procedural Standards for Testing, Adjusting, and Balancing of Environmental Systems" and this Section.

C. Perform testing and balancing procedures on each system according to the procedures contained in SMACNA's "HVAC Systems--Testing, Adjusting, and Balancing" and this Section.

D. Cut insulation, ducts, pipes, and equipment cabinets for installation of test probes to the minimum extent necessary to allow adequate performance of procedures. After testing and balancing, close probe holes and patch insulation with new materials identical to those removed. Restore vapor barrier and finish according to the insulation Specifications for this Project.



E. Mark equipment settings with paint or other suitable, permanent identification material, including damper-control positions, valve indicators, fan-speed-control levers, and similar controls and devices, to show final settings.

3.4 FUNDAMENTAL AIR SYSTEMS' BALANCING PROCEDURES

A. Prepare test reports for both fans and outlets. Obtain manufacturer's outlet factors and recommended testing procedures. Crosscheck the summation of required outlet volumes with required fan volumes.

B. Prepare schematic diagrams of systems' "as-built" duct layouts.

C. Determine the best locations in main and branch ducts for accurate duct airflow measurements.

D. Check the airflow patterns from the outside-air louvers and dampers and the return- and exhaust-air dampers, through the supply-fan discharge and mixing dampers.

E. Locate start-stop and disconnect switches, electrical interlocks, and motor starters.

F. Verify that motor starters are equipped with properly sized thermal protection.

G. Check dampers for proper position to achieve desired airflow path.

H. Check for airflow blockages.

I. Check condensate drains for proper connections and functioning.

J. Check for proper sealing of air-handling unit components.

3.5 MOTORS

A. Motors, 1/2 HP and Larger: Test at final balanced conditions and record the following data:

1. Manufacturer, model, and serial numbers. 2. Motor horsepower rating. 3. Motor rpm. 4. Efficiency rating if high-efficiency motor. 5. Nameplate and measured voltage, each phase. 6. Nameplate and measured amperage, each phase. 7. Starter thermal-protection-element rating.



B. Motors Driven by Variable-Frequency Controllers: Test for proper operation at speeds varying from minimum to maximum. Test the manual bypass for the controller to prove proper operation. Record observations, including controller manufacturer, model and serial numbers, and nameplate data.

3.6 TOLERANCES

A. Set HVAC system airflow and water flow rates within the following tolerances:

1. Supply, Return, and Exhaust Fans: Plus 5 to plus 10 percent. 2. Air Outlets and Inlets: 0 to minus 10 percent. 3. Heating-Water Flow Rate: 0 to minus 10 percent. 4. Cooling-Water Flow Rate: 0 to minus 5 percent.

3.7 FINAL REPORT

A. General: Typewritten, or computer printout in letter-quality font, on standard bond paper, in 3-ring binder, tabulated and divided into sections by tested and balanced systems.

B. Include a certification sheet in front of binder signed and sealed by the certified testing and balancing engineer.

1. Include a list of the instruments used for procedures, along with proof of calibration.

C. Final Report Contents: In addition to the certified field report data, include the following:

1. Pump curves. 2. Fan curves. 3. Manufacturers' test data. 4. Field test reports prepared by system and equipment installers. 5. Other information relative to equipment performance, but do not include

approved Shop Drawings and Product Data.

D. General Report Data: In addition to the form titles and entries, include the following data in the final report, as applicable:

1. Title page. 2. Name and address of testing, adjusting, and balancing Agent. 3. Project name. 4. Project location. 5. Architect's name and address. 6. Engineer's name and address.



7. Contractor's name and address. 8. Report date. 9. Signature of testing, adjusting, and balancing Agent who certifies the

report. 10. Summary of contents, including the following:

a. Design versus final performance. b. Notable characteristics of systems. c. Description of system operation sequence if it varies from the

Contract Documents.

11. Nomenclature sheets for each item of equipment. 12. Data for terminal units, including manufacturer, type size, and fittings. 13. Notes to explain why certain final data in the body of reports vary from

design values.

E. Air-Handling Unit Test Reports: For air-handling units with coils, include the following:

1. Unit Data: Include the following:

a. Unit identification. b. Location. c. Make and type. d. Model number and unit size. e. Manufacturer's serial number. f. Unit arrangement and class. g. Discharge arrangement. h. Sheave make, size in inches (mm), and bore. i. Sheave dimensions, center-to-center and amount of adjustments in

inches (mm). j. Number of belts, make, and size. k. Number of filters, type, and size.

2. Motor Data: Include the following:

a. Make and frame type and size. b. Horsepower and rpm. c. Volts, phase, and hertz. d. Full-load amperage and service factor. e. Sheave make, size in inches (mm), and bore. f. Sheave dimensions, center-to-center and amount of adjustments in

inches (mm).

3. Test Data: Include design and actual values for the following:

a. Total airflow rate in cfm (L/s).



b. Total system static pressure in inches wg (Pa). c. Fan rpm. d. Discharge static pressure in inches wg (Pa). e. Filter static-pressure differential in inches wg (Pa). f. Outside airflow in cfm (L/s). g. Return airflow in cfm (L/s). h. Outside-air damper position. i. Return-air damper position.

F. Fan Test Reports: For supply, return, and exhaust fans, include the following:

1. Fan Data: Include the following:

a. System identification. b. Location. c. Make and type. d. Model number and size. e. Manufacturer's serial number. f. Arrangement and class. g. Sheave make, size in inches (mm), and bore. h. Sheave dimensions, center-to-center and amount of adjustments in

inches (mm).

2. Motor Data: Include the following:

a. Make and frame type and size. b. Horsepower and rpm. c. Volts, phase, and hertz. d. Full-load amperage and service factor. e. Sheave make, size in inches (mm), and bore. f. Sheave dimensions, center-to-center and amount of adjustments in

inches (mm). g. Number of belts, make, and size.

3. Test Data: Include design and actual values for the following:

a. Total airflow rate in cfm (L/s). b. Total system static pressure in inches wg (Pa). c. Fan rpm. d. Discharge static pressure in inches wg (Pa). e. Suction static pressure in inches wg (Pa).

G. Instrument Calibration Reports: For instrument calibration, include the following:

1. Report Data: Include the following:



a. Instrument type and make. b. Serial number. c. Application. d. Dates of use. e. Dates of calibration.

3.8 ADDITIONAL TESTS

A. Within 90 days of completing testing, adjusting, and balancing, perform additional testing and balancing to verify that balanced conditions are being maintained throughout and to correct unusual conditions.

B. Seasonal Periods: If initial testing, adjusting, and balancing procedures were not performed during near-peak summer and winter conditions, perform additional inspections, testing, and adjusting during near-peak summer and winter conditions.


DUCT INSULATION 230713 - 1 East Fairmont Middle School

SECTION 230713 - DUCT INSULATION

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes insulating the following duct services:

1. Indoor, supply air as noted on “DUCTWORK SCHEDULE” on Drawings.

B. Related Sections:

1. Division 23 Section "Metal Ducts" for duct liners.

1.2 SUBMITTALS


B. Field quality-control reports.


A. Surface-Burning Characteristics: For insulation and related materials, as determined by testing identical products according to ASTM E 84, by a testing agency acceptable to authorities having jurisdiction. Factory label insulation and jacket materials and adhesive, mastic, tapes, and cement material containers, with appropriate markings of applicable testing agency.

1. Insulation Installed Indoors: Flame-spread index of 25 or less, and smoke-developed index of 50 or less.

2. Insulation Installed Outdoors: Flame-spread index of 75 or less, and smoke-developed index of 150 or less.

PART 2 - PRODUCTS

2.1 INSULATION MATERIALS

A. Comply with requirements in "Duct Schedule" on drawings for services where insulating materials shall be applied.

B. Products shall not contain asbestos, lead, mercury, or mercury compounds.


C. Products that come in contact with stainless steel shall have a leachable chloride content of less than 50 ppm when tested according to ASTM C 871.

D. Insulation materials for use on austenitic stainless steel shall be qualified as acceptable according to ASTM C 795.

E. Foam insulation materials shall not use CFC or HCFC blowing agents in the manufacturing process.

F. Mineral-Fiber Blanket Insulation: Mineral or glass fibers bonded with a thermosetting resin. Comply with ASTM C 553, Type II and ASTM C 1290,.

2.2 MANUFACTURERS

A. Subject to compliance with requirements, products that may be incorporated into the Work include, but are not limited to, the following:

a. CertainTeed Corp.; SoftTouch Duct Wrap. b. Johns Manville; Microlite. c. Knauf Insulation; Friendly Feel Duct Wrap. d. Manson Insulation Inc.; Alley Wrap. e. Owens Corning; SOFTR All-Service Duct Wrap.

2.2 INSULATION MATERIALS

A. Mineral-Fiber Blanket Thermal Insulation: Glass fibers bonded with a thermosetting resin. Comply with ASTM C 553, Type II, without facing and with all-service jacket manufactured from kraft paper, reinforcing scrim, aluminum foil, and vinyl film.

2.3 ADHESIVES

A. Materials shall be compatible with insulation materials, jackets, and substrates and for bonding insulation to itself and to surfaces to be insulated unless otherwise indicated.

B. Mineral-Fiber Adhesive: Comply with MIL-A-3316C, Class 2, Grade A.

1. Products: Subject to compliance with requirements, available products that may be incorporated into the Work include, but are not limited to, the following:

a. Childers Brand, Specialty Construction Brands, Inc., a business of H. B. Fuller Company; CP-127.

b. Eagle Bridges - Marathon Industries; 225.


c. Foster Brand, Specialty Construction Brands, Inc., a business of H. B. Fuller Company; 85-60/85-70.

d. Mon-Eco Industries, Inc.; 22-25.

2. For indoor applications, use adhesive that has a VOC content of 80 g/L or less when calculated according to 40 CFR 59, Subpart D (EPA Method 24).

2.4 TAPES

A. ASJ Tape: White vapor-retarder tape matching factory-applied jacket with acrylic adhesive, complying with ASTM C 1136.

B. FSK Tape: Foil-face, vapor-retarder tape matching factory-applied jacket with acrylic adhesive; complying with ASTM C 1136.

C. Aluminum-Foil Tape: Vapor-retarder tape with acrylic adhesive.

2.5 SECUREMENTS

A. Insulation Pins and Hangers:

1. Metal, Adhesively Attached, Perforated-Base Insulation Hangers: Baseplate welded to projecting spindle that is capable of holding insulation, of thickness indicated, securely in position indicated when self-locking washer is in place.

2. Nonmetal, Adhesively Attached, Perforated-Base Insulation Hangers: Baseplate fastened to projecting spindle that is capable of holding insulation, of thickness indicated, securely in position indicated when self-locking washer is in place.

3. Self-Sticking-Base Insulation Hangers: Baseplate welded to projecting spindle that is capable of holding insulation, of thickness indicated, securely in position indicated when self-locking washer is in place.

B. Staples: Outward-clinching insulation staples, nominal 3/4-inch- wide, stainless steel or Monel.


PART 3 - EXECUTION

3.1 PREPARATION

A. Surface Preparation: Clean and dry surfaces to receive insulation. Remove materials that will adversely affect insulation application.

3.2 GENERAL INSTALLATION REQUIREMENTS

A. Install insulation materials, accessories, and finishes with smooth, straight, and even surfaces; free of voids throughout the length of ducts and fittings.

B. Install insulation materials, vapor barriers or retarders, jackets, and thicknesses required for each item of duct system as specified in insulation system schedules on drawings.

C. Install accessories compatible with insulation materials and suitable for the service. Install accessories that do not corrode, soften, or otherwise attack insulation or jacket in either wet or dry state.

D. Install insulation with longitudinal seams at top and bottom of horizontal runs.

E. Install multiple layers of insulation with longitudinal and end seams staggered.

F. Keep insulation materials dry during application and finishing.

G. Install insulation with tight longitudinal seams and end joints. Bond seams and joints with adhesive recommended by insulation material manufacturer.

H. Install insulation with least number of joints practical.

I. Where vapor barrier is indicated, seal joints, seams, and penetrations in insulation at hangers, supports, anchors, and other projections with vapor-barrier mastic.

1. Install insulation continuously through hangers and around anchor attachments.

2. For insulation application where vapor barriers are indicated, extend insulation on anchor legs from point of attachment to supported item to point of attachment to structure. Taper and seal ends at attachment to structure with vapor-barrier mastic.

3. Install insert materials and install insulation to tightly join the insert. Seal insulation to insulation inserts with adhesive or sealing compound recommended by insulation material manufacturer.


J. Apply adhesives, mastics, and sealants at manufacturer's recommended coverage rate and wet and dry film thicknesses.

K. Install insulation with factory-applied jackets as follows:

1. Draw jacket tight and smooth. 2. Cover circumferential joints with 3-inch- wide strips, of same material as

insulation jacket. Secure strips with adhesive and outward clinching staples along both edges of strip, spaced 4 inches o.c.

3. Overlap jacket longitudinal seams at least 1-1/2 inches. Clean and dry surface to receive self-sealing lap. Staple laps with outward clinching staples along edge at 4 inches o.c.

a. For below ambient services, apply vapor-barrier mastic over staples.

4. Cover joints and seams with tape, according to insulation material manufacturer's written instructions, to maintain vapor seal.

5. Where vapor barriers are indicated, apply vapor-barrier mastic on seams and joints and at ends adjacent to duct flanges and fittings.

L. Cut insulation in a manner to avoid compressing insulation more than 75 percent of its nominal thickness.

M. Finish installation with systems at operating conditions. Repair joint separations and cracking due to thermal movement.

N. Repair damaged insulation facings by applying same facing material over damaged areas. Extend patches at least 4 inches beyond damaged areas. Adhere, staple, and seal patches similar to butt joints.

3.3 PENETRATIONS

A. Insulation Installation at Interior Wall and Partition Penetrations (That Are Not Fire Rated): Install insulation continuously through walls and partitions.

B. Insulation Installation at Fire-Rated Wall and Partition Penetrations: Terminate insulation at fire damper sleeves for fire-rated wall and partition penetrations. Externally insulate damper sleeves to match adjacent insulation and overlap duct insulation at least 2 inches.

1. Comply with requirements in Division 07 Section "Penetration Firestopping" for firestopping and fire-resistive joint sealers.


3.4 INSTALLATION OF MINERAL-FIBER INSULATION

A. Blanket Insulation Installation on Ducts and Plenums: Secure with adhesive and insulation pins.

1. Apply adhesives according to manufacturer's recommended coverage rates per unit area, for 100 percent coverage of duct and plenum surfaces.

2. Apply adhesive to entire circumference of ducts and to all surfaces of fittings and transitions.

3. Install either capacitor-discharge-weld pins and speed washers or cupped-head, capacitor-discharge-weld pins on sides and bottom of horizontal ducts and sides of vertical ducts as follows:

a. On duct sides with dimensions 18 inches and smaller, place pins along longitudinal centerline of duct. Space 3 inches maximum from insulation end joints, and 16 inches o.c.

b. On duct sides with dimensions larger than 18 inches, place pins 16 inches o.c. each way, and 3 inches maximum from insulation joints. Install additional pins to hold insulation tightly against surface at cross bracing.

c. Pins may be omitted from top surface of horizontal, rectangular ducts and plenums.

d. Do not overcompress insulation during installation. e. Impale insulation over pins and attach speed washers. f. Cut excess portion of pins extending beyond speed washers or bend

parallel with insulation surface. Cover exposed pins and washers with tape matching insulation facing.

4. For ducts and plenums with surface temperatures below ambient, install a continuous unbroken vapor barrier. Create a facing lap for longitudinal seams and end joints with insulation by removing 2 inches from one edge and one end of insulation segment. Secure laps to adjacent insulation section with 1/2-inch outward-clinching staples, 1 inch o.c. Install vapor barrier consisting of factory- or field-applied jacket, adhesive, vapor-barrier mastic, and sealant at joints, seams, and protrusions.

a. Repair punctures, tears, and penetrations with tape or mastic to maintain vapor-barrier seal.

b. Install vapor stops for ductwork and plenums operating below 50 deg F at 18-foot intervals. Vapor stops shall consist of vapor-barrier mastic applied in a Z-shaped pattern over insulation face, along butt end of insulation, and over the surface. Cover insulation face and surface to be insulated a width equal to two times the insulation thickness, but not less than 3 inches.


5. Overlap unfaced blankets a minimum of 2 inches on longitudinal seams and end joints. At end joints, secure with steel bands spaced a maximum of 18 inches o.c.

6. Install insulation on rectangular duct elbows and transitions with a full insulation section for each surface. Install insulation on round and flat-oval duct elbows with individually mitered gores cut to fit the elbow.

7. Insulate duct stiffeners, hangers, and flanges that protrude beyond insulation surface with 6-inch- wide strips of same material used to insulate duct. Secure on alternating sides of stiffener, hanger, and flange with pins spaced 6 inches o.c.


INSTRUMENTATION AND CONTROL FOR HVAC 230900 - 1 East Fairmont Middle School

SECTION 230900 - INSTRUMENTATION AND CONTROL FOR HVAC

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes control equipment for HVAC systems and components, including control components for terminal heating and cooling units not supplied with factory-wired controls.

B. See Division 23 Section "Sequence of Operations for HVAC Controls" for requirements that relate to this Section.

1.2 SUBMITTALS

A. Product Data: For each control device indicated.

B. Shop Drawings:

1. Schematic flow diagrams. 2. Power, signal, and control wiring diagrams. 3. Details of control panel faces. 4. DDC System Hardware: Wiring diagrams, schematic floor plans, and

schematic control diagrams. 5. Control System Software: Schematic diagrams, written descriptions, and

points list.

C. Software and firmware operational documentation.

D. Field quality-control test reports.

E. Operation and maintenance data.

1.3 SYSTEM DESRIPTION AND FUNCTIONALITY

A. The control system shall be as shown and consist of a high-speed, peer-to-peer network of DDC controllers and a stand alone web server operator interface. De-pict each mechanical system and building floor plan by a point-and-click graphic. A web server shall gather data from this system and generate web pages acces-sible through a conventional web browser on each PC connected to the network. Operators shall be able to perform all normal operator functions through the web browser interface. Operators with sufficient access level shall have an ability to make changes to all system and equipment graphics in the web server in addi-tion to having full DDC system access to make configuration changes to the con-


trol system. Any tools required for making graphic changes shall be provided with web server.

B. Operator Interface. Furnish one Web server interface as shown on the system drawings. Operators shall be able to access all necessary operational information in the DDC system via client computer utilizing IE web browser. Client computer and IE web browsing software shall not be furnished under this section.

1. Web server shall connect via the LAN and be able to simultaneously serve up controller information to multiple operators connected via LAN with IE web browsers. Each client web browser connected to server shall be able to access all system information.

2. Web server shall be compatible with Wireless Access Protocol (WAP) en-abled cellular telephone or personal digital assistant (PDA). The PDA/WAP interface may be text-based and shall provide a summary of the most important data.

3. With the use of a remote SMTP email server the operators interface web server shall be able to notify personnel of an alarm or record information about an alarm in the DDC system.

C. Web Server Hardware. Furnish one compact web server with Ethernet port for LAN or direct operator client computer access. The web server shall be capable of communicating to the peer to peer DDC controller network. Any required in-stallation or commissioning software shall be pre-installed on the web server. In-stallation or commissioning of the web server shall be done through a client computer with a standard web browser.

D. Communication. Web server or workstation and controllers shall communicate using BACnet protocol. Web server or workstation and control network backbone shall communicate using ISO 8802-3 (Ethernet) Data Link/Physical layer protocol and BACnet/IP addressing as specified in ANSI/ASHRAE 135-2004, BACnet An-nex J.

E. Operator Functions. Operator interface shall allow each authorized operator to execute the following functions as a minimum:

1. Log In and Log Out. System shall require user name and password to log in to operator interface.

2. Point-and-click Navigation. Operator interface shall be graphically based and shall allow operators to access graphics for equipment and geograph-ic areas using point-and-click navigation.

3. View and Adjust Equipment Properties. Operators shall be able to view controlled equipment status and to adjust operating parameters such as set points, PID gains, on and off controls, and sensor calibration.


4. View and Adjust Operating Schedules. Operators shall be able to view scheduled operating hours of each schedulable piece of equipment on a weekly or monthly calendar-based graphical schedule display, to select and adjust each schedule and time period, and to simultaneously sched-ule related equipment. System shall clearly show exception schedules and holidays on the schedule display.

5. View and Respond to Alarms. Operators shall be able to view a list of cur-rently active system alarms, to acknowledge each alarm, and to clear (de-lete) unneeded alarms. Remote users shall be able to receive alarms via emails or cell phone text messages.

6. View and Configure Trends. Operators shall be able to view a trend graph of each trended point and to edit graph configuration to display a specific time period or data range. Operator shall be able to create custom trend graphs to display on the same page data from multiple trended points.

7. View and Configure Reports. Operators shall be able to run preconfigured reports, to view report results, and to customize report configuration to show data of interest.

8. Manage Control System Hardware. Operators shall be able to view con-troller status, to restart (reboot) each controller, and to download new con-trol software to each controller.

9. Manage Operator Access. Typically, only a few operators are authorized to manage operator access. Authorized operators shall be able to view a list of operators with system access and of functions they can perform while logged in. Operators shall be able to add operators, to delete opera-tors, and to edit operator function authorization. Operator shall be able to authorize each operator function separately.

B. System Software.

1. Operating System and required software. Web server operator interface shall be a self contained web server without the need for any type of maintenance. Any required operating system or software shall be factory loaded and maintenance free.

2. System Graphics. Operator interface shall be graphical and shall include at least one graphic per piece of equipment or occupied zone, graphics for each chilled water and hot water system, and graphics that summarize conditions on each floor of each building included in this contract. Indicate thermal comfort on floor plan summary graphics using dynamic colors to represent zone temperature relative to zone setpoint.

a. Functionality. Graphics shall allow operator to monitor system sta-tus, to view a summary of the most important data for each con-trolled zone or piece of equipment, to use point-and-click navigation


between zones or equipment, and to edit setpoints and other speci-fied parameters.

b. Animation. Graphics shall be able to animate by displaying different image files for changed object status.

c. Alarm Indication. Indicate areas or equipment in an alarm condition using color or other visual indicator.

d. Format. Graphics shall be saved in an industry-standard format such as BMP, JPEG, PNG, or GIF. Web-based system graphics shall be viewable on browsers compatible with World Wide Web Consortium browser standards. Web graphic format shall require no plug-in (such as HTML and JavaScript) or shall only require widely available no-cost plug-ins (such as Active-X and Macrome-dia Flash).

C. System Tools. System shall provide the following functionality to authorized op-erators as an integral part of the operator interface or as stand-alone software programs. If furnished as part of the interface, the tool shall be available from each workstation or web browser interface. If furnished as a stand-alone pro-gram, software shall be installable on standard Windows compatible PCs with no limit on the number of copies that can be installed under the system license.

1. Automatic System Database Configuration. Each web server shall store internally store a copy of the current system database, including controller firmware and software. Stored database shall be automatically updated with each system configuration or controller firmware or software change.

2. Controller Memory Download. Operators shall be able to download memory from the system database to each controller.

3. System Configuration. Operators shall be able to configure the system.

4. Online Help. Context-sensitive online help for each tool shall assist opera-tors in operating and editing the system.

5. Security. System shall require a user name and password to view, edit, add, or delete data.

a. Operator Access. Each user name and password combination shall define accessible viewing, editing, adding, and deleting functions in each system application, editor, and object.

b. Automatic Log Out. Automatically log out each operator if no key-board or mouse activity is detected. Operators shall be able to ad-just automatic log out delay.


c. Encrypted Security Data. Store system security data including op-erator passwords in an encrypted format. System shall not display operator passwords.

6. System Diagnostics. System shall automatically monitor controller and I/O point operation. System shall annunciate controller failure and I/O point locking (manual overriding to a fixed value).

7. Alarm Processing. System input and status objects shall be configurable to alarm on departing from and on returning to normal state. Operator shall be able to enable or disable each alarm and to configure alarm limits, alarm limit differentials, alarm states, and alarm reactions for each system object. Configure and enable alarm points as specified in Points List. Alarms shall be BACnet alarm objects and shall use BACnet alarm ser-vices.

8. Alarm Messages. Alarm messages shall use an English language de-scriptor without acronyms or mnemonics to describe alarm source, loca-tion, and nature.

9. Alarm Reactions. Operator shall be able to configure (by object) actions workstation or web server shall initiate on receipt of each alarm. As a min-imum, workstation or web server shall be able to log, print, start programs, display messages, send e-mail, send page, and audibly annunciate.

10. Alarm Maintenance. Operators shall be able to view system alarms and changes of state chronologically, to acknowledge and delete alarms, and to archive closed alarms to the workstation or web server from each work-station or web browser interface.

11. Trend Configuration. Operator shall be able to configure trend sample or change of value (COV) interval, start time, and stop time for each system data object and shall be able to retrieve data for use in spreadsheets and standard database programs. Controller shall sample and store trend data and shall be able to archive data to the hard disk. Configure trends as specified in Points List. Trends shall be BACnet trend objects.

12. Object and Property Status and Control. Operator shall be able to view, and to edit if applicable, the status of each system object and property by menu, on graphics.

13. Reports and Logs. Operator shall be able to select, to modify, to create, and to print reports and logs. Operator shall be able to store report data in a format accessible by standard spreadsheet and word processing pro-grams.

14. Standard Reports. Furnish the following standard system reports:

a. Reports shall be filtered based upon the selected equipment


b. Alarm Reports

i. Alarm Summary - Current alarms

ii. Alarm Sources – List of equipment and associated alarm conditions

iii. Alarm Actions – Configured alarm actions such as e-mail and alarm pop-up

c. Schedule Reports

i. Effective Schedules – Displays effective schedules for each equipment

ii. Schedule Instances – Displays all schedules entered

d. Security Reports – Maintains audit of all actions taken through user interface

e. Commissioning Reports – Provide equipment checkout status and notes

f. Equipment Reports – Provide reports showing trended points and available network points

15. Custom Reports. Operator shall be able to create custom reports that re-trieve data, including archived trend data, from the system, that analyze data using common algebraic calculations, and that present results in tab-ular or graphical format. Reports shall be launched from the operator inter-face.

16. Graphics Generation. Graphically based tools and documentation shall al-low Operator to edit system graphics, to create graphics, and to integrate graphics into the system. Operator shall be able to add analog and binary values, dynamic text, static text, and animation files to a background graphic using a mouse.

17. Graphics Library. Complete library of standard HVAC equipment graphics shall include equipment such as chillers, boilers, air handlers, terminals, fan coils, and unit ventilators. Library shall include standard symbols for other equipment including fans, pumps, coils, valves, piping, dampers, and ductwork. Library graphic file format shall be compatible with graphics generation tools.

D. Portable Operator's Terminal. Provide all necessary software to configure an IBM-compatible laptop computer for use as a Portable Operator's Terminal. Op-erator shall be able to connect configured Terminal to the system network or di-rectly to each controller for programming, setting up, and troubleshooting.


E. Web services data exchange: System shall support Web services data exchange with any other system that complies with XML (extensible markup language) and SOAP (simple object access protocol) standards specified by the Web Services Interoperability Organization (WS-I) Basic Profile 1.0 or higher. Web services support shall as a minimum be provided at the workstation or web server level and shall enable data to be read from or written to the DDC system.

1. System shall support Web services read data requests by retrieving re-quested trend data or point values (I/O hardware points, analog value software points, or binary value software points) from any system control-ler or from the trend history database.

2. System shall support Web services write data request to each analog and binary object that can be edited through the system operator interface by downloading a numeric value to the specified object.

3. For read or write requests, the system shall require user name and pass-word authentication and shall support SSL (Secure Socket Layer) or equivalent data encryption.

4. System shall support discovery through a Web services connection or shall provide a tool available through the Operator Interface that will reveal the path/identifier needed to allow a third party Web services device to read data from or write data to any object in the system which supports this service.


A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. In other Part 2 articles where titles below introduce lists, the following requirements apply to product selection:

1. Manufacturers: Subject to compliance with requirements, provide products by one of the manufacturers specified.


2.2 CONTROL SYSTEM

A. Available Manufacturer:

1. Carrier

B. Control system shall consist of sensors, indicators, actuators, final control elements, interface equipment, other apparatus, and accessories to control mechanical systems.

C. Control system shall consist of sensors, indicators, actuators, final control elements, interface equipment, other apparatus, accessories, and software connected to distributed controllers operating in multiuser, multitasking environment on token-passing network and programmed to control mechanical systems. An operator workstation permits interface with the network via dynamic color graphics with each mechanical system, building floor plan, and control device depicted by point-and-click graphics.

2.3 Communication

A. Control products, communication media, connectors, repeaters, hubs, and rout-ers shall comprise a BACnet internetwork. Controller and operator interface communication shall conform to ANSI/ASHRAE Standard 135-2004, BACnet.

B. Install new wiring and network devices as required to provide a complete and workable control network.

C. Each controller shall have a communication port for temporary connection to a laptop computer or other operator interface. Connection shall support memory downloads and other commissioning and troubleshooting operations.

D. Internetwork operator interface and value passing shall be transparent to inter-network architecture.

1. An operator interface connected to a controller shall allow the operator to interface with each internetwork controller as if directly connected. Con-troller information such as data, and status shall be viewable and editable from each internetwork controller.

2. Inputs, outputs, and control variables used to integrate control strategies across multiple controllers shall be readable by each controller on the in-ternetwork. An authorized operator shall be able to edit cross-controller links by typing a standard object address or by using a point-and-click in-terface.

E. Controllers with real-time clocks shall use the BACnet Time Synchronization ser-vice. System shall automatically synchronize system clocks daily from an opera-


tor-designated controller via the internetwork. If applicable, system shall automat-ically adjust for daylight saving and standard time.

2.4 Controller Software

A. Building and energy management application software shall reside and operate in system controllers. Applications shall be configurable through the operator workstation, web browser interface, or engineering workstation.

B. Memory and System Time. All controllers shall have a Non-Volatile Memory providing indefinite storage of application and configuration data. The system must have an ability to maintain time, and automatically correct for daylight sav-ings time and leap year adjustments. In the event of power failure or user gener-ated power cycle, all system components must automatically updated with cur-rent time and date from a network Time Sync device. The controller shall also have the capability of changing occupancy mode by reading a set of discrete, dry contacts controlled by an external time clock.

C. Stand alone capability. All controllers shall be capable of providing all control functions of the HVAC system without the use of a computer. The controllers shall include the inherent capability to access the system control selections as well as to monitor system performance by means of a communicating network with a PC and EMS software program.

D. System Security.

1. Provide Web server operator interface.

2. Hand held or wall mounted local interface devices that allow configuration access shall be password protected with minimum of two levels of securi-ty. Level one shall provide limited access to controller operational parame-ters and level two shall provide full access to controller operational and configuration parameters.

E. Scheduling.

1. System shall provide the following schedule options as a minimum:

2. Weekly. Provide separate schedules for each day of the week. Each schedule shall be able to include up to 5 occupied periods (5 start-stop pairs or 10 events).

3. Exception. Operator shall be able to designate an exception schedule for each of the next 365 days. After an exception schedule has executed, sys-tem shall discard and replace exception schedule with standard schedule for that day of the week.

4. Holiday. Operator shall be able to define 24 special or holiday schedules of varying length on a scheduling calendar that repeats each year.


F. Provide Binary and Analog Alarms.

G. Provide Alarm Reporting.

H. Remote Communication. System shall automatically contact operator workstation or server on receipt of critical alarms.

I. Demand Limiting.

1. System shall monitor building power consumption from building power me-ter pulse generator signals or from building feeder line watt transducer or current transformer.

2. When power consumption exceeds adjustable levels, system shall auto-matically adjust set points, de-energize low-priority equipment, and take other programmatic actions to reduce demand as specified in Sequence of Operations for HVAC Controls. When demand drops below adjustable levels, system shall restore loads as specified.

J. Sequencing. Application software shall sequence equipment as specified in Se-quence of Operations for HVAC Controls.

K. Staggered Start. System shall stagger controlled equipment restart after power outage. Operator shall be able to adjust equipment restart order and time delay between equipment restarts.

L. Anti-Short Cycling. Binary output objects shall be protected from short cycling by means of preconfigured minimum on-time and off-time settings, customized for the specific requirements of the application.

M. On and Off Control with Differential. System shall provide direct- and reverse-acting on and off algorithms with adjustable differential to cycle a binary output based on a controlled variable and setpoint.

N. Demand Controlled Ventilation

1. System Controllers:

a. System controllers shall be specifically designed to provide de-mand-controlled ventilation (DCV) operation using a proportional-integral (PI) control loop. All DCV application software shall be res-ident in the system controller’s memory and shall be factory-tested and factory-configured. The system controller shall be capable of stand-alone operation and shall execute the DCV control functions with out being dependent on a network system, additional hard-ware, or intermediate controllers.


b. The system controller shall be designed for connection to zone con-trollers to perform DCV control functions as part of an integral venti-lation system.

c. The system controller shall be designed to interface directly with the specified CO2 sensors

d. The system controller shall be capable of maintaining a ventilation setpoint through a DCV algorithm in conjunction with zone control-lers to fulfill the requirements of ASHRAE standard, 62-1989 “Venti-lation For Acceptable Indoor Air Quality” (including Addendum 62a-1990).

e. DCV control sequences shall be as specified in Div. 23 Section “Sequences of Operation”.

2. Unit (Product Integrated) Controllers

a. The unit controller shall be a solid-state microprocessor controller using direct digital control and software specifically designed to provide demand controlled ventilation (DCV) functions. The control-ler shall be factory-installed and wired within the unit, and shall be furnished complete with all application software to perform DCV functions. The unit controller shall be pre-configured and pre-tested for DCV operation

b. The controller shall maintain an adjustable CO2 setpoint by control of the mixed-air damper position. The unit controller shall also have the ability to limit the maximum amount of outdoor air during DCV operation.

c. The unit controller shall be designed to interface directly with the specified CO2 sensors.

d. DCV control sequences shall be as specified herein.

2.5 Controllers

A. General. The control system shall be available as a complete package with the required input sensors and devices readily available. Provide Building Controllers (BC), Advanced Application Controllers (AAC), Application Specific Controllers (ASC), and Sensors (SEN) as required to achieve performance specified in Par-agraph 2.2.

B. Every device in the system which executes control logic and directly controls HVAC equipment must conform to a standard BACnet Device profile as specified in ANSI/ASHRAE 135-2004, BACnet Annex L. Unless otherwise specified.

C. BACnet.


1. Building Controllers (BCs). Each BC shall conform to BACnet Building Controller (B-BC) device profile as specified in ANSI/ASHRAE 135-2004, BACnet Annex L and shall be listed as a certified B-BC in the BACnet Testing Laboratories (BTL) Product Listing.

2. Advanced Application Controllers (AACs). Each AAC shall conform to BACnet Advanced Application Controller (B-AAC) device profile as speci-fied in ANSI/ASHRAE 135-2004, BACnet Annex L and shall be listed as a certified B-AAC in the BACnet Testing Laboratories (BTL) Product Listing.

3. Application Specific Controllers (ASCs). Each ASC shall conform to BAC-net Application Specific Controller (B-ASC) device profile as specified in ANSI/ASHRAE 135-2004, BACnet Annex L and shall be listed as a certi-fied B-ASC in the BACnet Testing Laboratories (BTL) Product Listing.

4. BACnet Communication.

a. Each BC shall reside on or be connected to a BACnet network us-ing ISO 8802-3 (Ethernet) Data Link/Physical layer protocol and BACnet/IP addressing.

b. BACnet routing shall be performed by BCs or other BACnet device routers as necessary to connect BCs to networks of AACs and ASCs.

c. Each AAC shall reside on a BACnet network using ISO 8802-3 (Ethernet) Data Link/Physical layer protocol with BACnet/IP ad-dressing, or it shall reside on a BACnet network using the MS/TP Data Link/Physical layer protocol.

d. Each ASC shall reside on a BACnet network using the MS/TP Data Link/Physical layer protocol.

D. Communication.

1. Service Port. Each controller shall provide a service communication port for connection to a Portable Operator's Terminal. Connection shall be ex-tended to space temperature sensor ports where shown on drawings.

2. Signal Management. BC and ASC operating systems shall manage input and output communication signals to allow distributed controllers to share real and virtual object information and to allow for central monitoring and alarms.

3. Data Sharing. Each BC and AAC shall share data as required with each networked BC and AAC.

4. Stand-Alone Operation. Each piece of equipment shall be controlled by a single controller to provide stand-alone control in the event of communica-


tion failure. All I/O points specified for a piece of equipment shall be inte-gral to its controller. Provide stable and reliable stand-alone control using default values or other method for values normally read over the network.

E. Environment. Controller hardware shall be suitable for anticipated ambient condi-tions.

1. Controllers used outdoors or in wet ambient conditions shall be mounted in waterproof enclosures and shall be rated for operation at -29°C to 60°C (-20°F to 140°F).

2. Controllers used in conditioned space shall be mounted in dust-protective enclosures and shall be rated for operation at 0°C to 50°C (32°F to 120°F).

F. Keypad. Where specified provide a local keypad and display for each BC and ASC. Operator shall be able to use keypad to view and edit data. Keypad and display shall require password to prevent unauthorized use. If the manufacturer does not normally provide a keypad and display for each BC and ASC, provide the software and any interface cabling needed to use a laptop computer as a Portable Operator's Terminal for the system.

G. Serviceability.

1. Controllers shall have diagnostic LEDs for power, communication, and processor.

2. Wires shall be connected to a field-removable modular terminal strip or to a termination card connected by a ribbon cable.

3. All controllers in the system shall continually check its processor and memory circuit status and shall generate an alarm on abnormal operation. System shall continuously check controller network and generate alarm for each controller that fails to respond.

H. Memory.

1. Controller memory shall support operating system, database, and pro-gramming requirements.

2. Each controller in the system shall use nonvolatile memory providing in-definite storage of BIOS, application programming, and all configuration data in the event of power loss.

I. Immunity to Power and Noise. Controllers shall be able to operate at 90% to 110% of nominal voltage rating and shall perform an orderly shutdown below 80% nominal voltage. Operation shall be protected against electrical noise of 5 to 120 Hz and from keyed radios up to 5 W at 1 m (3 ft).


J. All wire required for all the items shall meet all applicable codes and shall be ple-num rated.

K. General Purpose Controller (AHUC): General Purpose Controller, defined as Advanced Application Controllers (AAC), shall be a solid state micro-controller with pre-tested and factory configured software designed for controlling AHU DDC algorithms. The controller shall also contain a graphical controller based programming language for creating complex control strategies for unique AHU applications. Custom programs shall be retained in controller memory and shall not require a host CPU to operate. All custom programming point data shall be transferable from one controller to another (if networked) directly without an on-line CPU or host computer. The controller shall be capable of operating in either a stand-alone mode or as part of a network. AHUC shall contain all associated transformers, switches, and control hardware mounted in a NEMA1 enclosure and mounted on the supply fan section of air handler. The installer shall install miscellaneous sensors and configure the GPC’s database with appropriate algo-rithms, points, and schedules necessary to control and monitor the units applica-tion needs. Configuration shall be accomplished from a laptop computer or a front-end network operator workstation. All electrical components shall be UL and ETL listed. AHUC shall be powered by a dedicated 120 Vac to 24 Vac, 50 or 60 Hz transformer. The electrical power-disconnect and the fan motor starter shall be factory supplied and installed. Control box connections shall be provided to wire the fan starter’s HOA (Hand/Off/Automatic) switch.

1. System Control Panel Functionality

The GPC controller shall support a wide range of air handler, mechanical room equipment, and building control applications, and include facilities management routines and custom programming capability. The GPC module shall also perform self-diagnostic tests at start-up, monitors unit operation, and provide alarms.

2. Controller And Sensor Hardware

The following hardware shall be factory-supplied, mounted, and wired (un-less otherwise noted below). If field mounting is required, component loca-tion shall be provided on the plans.

a. Processor Module: Contains control algorithms (must be filed programmed).

b. Supply Air Sensor: Shall be a 10,000-ohms thermistor.

c. Return Air Temperature Sensor: Shall be a 10,000-ohms thermistor.

d. Air Quality Sensor: Field-mounted and wired in duct or on wall. Sensor is self-calibrating infrared CO2 type with a range of 0 to 2000 ppm and a linear voltage output of 2 to 10 Vdc.


e. Space Temperature sensor (For CV Units Only): Shall be a field-mounted and wired 10,000-ohms thermistor with a timed-override push button, RJ14`communication port, and optional setpoint adjustment sidebar.

f. Outside Air Temperature Sensor: A 5,000-ohms thermistor field-installed in fan section.

g. Static Pressure Transducer and Probe (VAV Units Only):

Static pressure probe field-mounted and wired. Transducer range shall be 0.0 to 5.0 in. wg. with a 2-10 Vdc signal.

h. Mixed Air Temperature Sensor:

Shall be multiple 10,000-ohms thermistors encased within a flexible serpentine copper tube.

i. Low-Temperature Thermostat (LTT):

Shall consist of an adjustable thermostat with a 20-ft long capillary tube with trip setting set at 35F.

j. Space Humidity Sensors:

Shall be field-supplied and field-installed in duct or on wall. Shall have a range of 10 to 90% with an accuracy of ± 3% at 25 C (77 F).

k. High Pressure Switch (HPS) (VAV Units Only):

Adjustable SPDT switch wired in series with fan. Factory set at 3.0-in. w.g. with a range of 1.4 to 5.5 in. wg.

l. Airflow Switch (AFS) (CV Units Only):

The adjustable airflow switch shall be a SPDT snap-acting switch, factory set at 0.2 in. wg, with an operating range of 0.05 to 10.0 in. wg.

m. Differential Enthalpy Control:

Controller shall have outside and return air sensors, and shall be field-supplied, mounted, and wired.

n. Filter Status Switches (FLTS):

SPDT switch shall have an adjustable operating range of 0.05 to 2.0 in. wg and shall be factory set to trip at 0.5 in. wg. Shall be fac-tory installed across the first filter section. Additional switches may be field-supplied and installed for each additional filter section add-ed to the unit.

o. Supply Fan relay:

SPST shall interface with the motor starter circuit or VFD.

p. Modulating Mixed Air Damper Actuators:


All mixed-air damper actuators shall be factory-supplied, wired, and installed directly on the damper jackshafts.

3. Wiring Guidelines

a. Component Wiring: Each field-installed control device shall come from the factory with installation instructions, including the appropriate wiring guidelines.

b. System Wiring:

Since air-handling systems are normally made up of multiple com-ponent sections, control system component wiring shall utilize quick connect snap plugs on wires that run between sections. All devices mounted within the various sections shall connect back to the GPC mounted on the supply fan section.

L. General Purpose Controller (GPC): Defined as Advanced Application Controllers (AAC), the General Purpose Controller shall be a solid state micro-controller with pre-tested and factory configured software designed for controlling building equipment using DDC algorithms and facility management routines. The controller shall also contain a graphical controller based programming lan-guage for creating complex control strategies for specific unique applications. Custom programs shall be retained in controller memory and shall not require a host CPU to operate. All custom programming point data shall be transferable from one controller to another (if networked) directly without an on-line CPU or host computer. The controller shall be capable of operating in either a stand-alone mode or as part of a network.

1. Input and output devices shall be wired to “quick-connect plug type” termi-nals to facilitate removal of the module without disconnecting wiring from the plug type terminal.

2. Inputs. Shall support the following input types as a minimum

a. Dry or pulsed dry contacts

b. 0-5 VDC

c. 0–10 VDC

d. 4–20 mA

e. 10K thermistors

f. 1000-ohm Nickel RTD

3. Outputs. Shall support the following input types as a minimum

a. Discrete types


b. 0–10 VDC analog type

c. 4–20 mA analog type

4. Real-Time Clock. Shall feature and maintain a 365-day hardware clock/calendar with holiday functions.

5. Direct digital control routines. The following types of direct digital control routines shall be provided as a minimum:

a. Indoor/Outdoor Lighting Control

b. Time Schedule with/without override

c. Enthalpy/Analog Comparison

d. Analog Comparison

e. Interlock / Permissive Interlock

f. Fan Control

g. Time Schedule with/without override

h. Unit Heater

i. Constant Volume Air Source control

j. Electric Meter with Demand Limit

2.6 Auxiliary Control Devices

A. Ventilation Sensors Wall-Mounted Carbon Dioxide Sensors. Carbon dioxide sen-sor (CO2) shall have integral programming to perform automatic baseline calibra-tion without user interface. The recommended manual recalibration period shall not be less than five years. Sensors shall be equipped with an LED display. Oth-er features of wall-mounted Carbon Dioxide sensors shall include:

6. Operating conditions: 60 to 90ºF (15 to 32ºC), and 0 to 95% RH, non-condensing

7. Power supply: 18-30 VAC, 50/60 Hz half-wave rectified [18-–42 VDC po-larity protected]

8. CO2 sensor output: 4 to 20 mA or 0 to 10-volt signal.

9. CO2 measurement range: 0–2,000 PPM.

10. Setpoint: adjustable.

11. Sensitivity: ±20 PPM.

12. Accuracy: ±100 PPM at 60 to 90ºF (15 to 32ºC); and 760 mmHg


B. Ventilation Sensors Duct-Mounted Carbon Dioxide Sensor.

a. Carbon Dioxide (CO2) sensors for duct-mounted applications shall be identical to the wall-mounted sensors specified above except as described below.

b. The CO2 sensor shall be mounted in an enclosed aspirator box that mounts directly to the duct. The aspirator box shall be equipped with an induction tube to direct a side-stream of air from the duct through the CO2 sensor. A hinged, clear access door shall be installed on the front of the aspirator box to permit access to the sensor and to permit viewing the sensor without opening the door.

c. CO2 sensors for duct-mounted applications shall be designed for flow-through sampling.

C. Temperature Sensors.

a. Room Space Temperature (SPT)

i. Shall have integrated, easy-to-read LCD on display. Able to display space temperature, outside air temperature, heating setpoint, cool-ing setpoint, and local override (after hours occupancy), time

ii. Shall have Precise 10K ohm thermistor with + 0.36ºF (0.2ºC) standard accuracy and less than 0.18ºF (0.01ºC) drift over a ten year span – requires no maintenance or re-calibration

iii. Shall allow zone setpoints adjustment by pressing the Warmer or Cooler buttons

iv. Shall have a hidden communication port allows a laptop computer or a handheld keypad to commission and maintain the connected equipment easily

v. Shall allow multiple SPT sensors to be daisy-chained to one con-troller for temperature averaging or high/low select control

vi. Shall have ability to mount on a standard 2” x 4” electrical box for easy installation

b. Duct Sensors. Duct sensors shall be single point or averaging as shown. Averaging sensors shall be a minimum of 1.5 m (5 ft) in length per 1 m 2(10 ft 2) of duct cross-section.

D. Humidity Sensors.

a. Duct and room sensors shall have a sensing range of 20%-80%.


b. Duct sensors shall have a sampling chamber.

c. Outdoor air humidity sensors shall have a sensing range of 20%-95% RH and shall be suitable for ambient conditions of 40°C-75°C (-40°F-170°F).

d. Humidity sensors shall not drift more than 1% of full scale annually.

E. Voltage Transformers.

a. AC voltage transformers shall be UL/CSA recognized, 600 Vac rated, and shall have built-in fuse protection.

b. Transformers shall be suitable for ambient temperatures of 4°C-55°C (40°F-130°F) and shall provide ±0.5% accuracy at 24 Vac and 5 VA load.

c. Windings (except for terminals) shall be completely enclosed with metal or plastic.

2.9 GAS DETECTION EQUIPMENT

D. Carbon Monoxide Detectors: Single or multichannel, dual-level detectors using solid-state plug-in sensors with a 3-year minimum life; suitable over a temperature range of 32 to 104 deg F; with 2 factory-calibrated alarm levels at 50 and 100 ppm.

E. Carbon Dioxide Sensor and Transmitter: Single detectors using solid-state infrared sensors; suitable over a temperature range of 23 to 130 deg F and calibrated for 0 to 2 percent, with continuous or averaged reading, 4- to 20-mA output;, for wall mounting.

2.10 CONTROL CABLE

F. Electronic and fiber-optic cables for control wiring are specified in Division 27 Section "Communications Horizontal Cabling."

PART 3 - EXECUTION

3.1 INSTALLATION

A. Verify location of thermostats, humidistats, and other exposed control sensors with Drawings and room details before installation. Install devices 48 inches above the floor.

1. Install averaging elements in ducts and plenums in crossing or zigzag pattern.


B. Install guards on thermostats in the following locations:

1. Gymnasium. 2. Where indicated.

C. Install labels and nameplates to identify control components according to Division 23 Section "Identification for HVAC Piping and Equipment."

D. Install electronic and fiber-optic cables according to Division 27 Section "Communications Horizontal Cabling."

3.2 ELECTRICAL WIRING AND CONNECTION INSTALLATION

A. Install raceways, boxes, and cabinets according to Division 26 Section "Raceway and Boxes for Electrical Systems."

B. Install building wire and cable according to Division 26 Section "Low-Voltage Electrical Power Conductors and Cables."

C. Install signal and communication cable according to Division 27 Section "Communications Horizontal Cabling."

1. Conceal cable, except in mechanical rooms and areas where other conduit and piping are exposed.

2. Install exposed cable in raceway. 3. Bundle and harness multiconductor instrument cable in place of single

cables where several cables follow a common path. 4. Fasten flexible conductors, bridging cabinets and doors, along hinge side;

protect against abrasion. Tie and support conductors. 5. Number-code or color-code conductors for future identification and service

of control system, except local individual room control cables. 6. Install wire and cable with sufficient slack and flexible connections to allow

for vibration of piping and equipment.

D. Connect hand-off-auto selector switches to override automatic interlock controls when switch is in hand position.

3.3 FIELD QUALITY CONTROL

A. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect, test, and adjust field-assembled components and equipment installation, including connections, and to assist in field testing. Report results in writing.

B. Perform the following field tests and inspections and prepare test reports:


1. Operational Test: After electrical circuitry has been energized, start units to confirm proper unit operation. Remove and replace malfunctioning units and retest.

2. Test and adjust controls and safeties. 3. Test calibration of controllers by disconnecting input sensors and

stimulating operation with compatible signal generator. 4. Test each point through its full operating range to verify that safety and

operating control set points are as required. 5. Test each control loop to verify stable mode of operation and compliance

with sequence of operation. Adjust PID actions. 6. Test each system for compliance with sequence of operation. 7. Test software and hardware interlocks.

C. DDC Verification:

1. Verify that instruments are installed before calibration, testing, and loop or leak checks.

2. Check instruments for proper location and accessibility. 3. Check instrument installation for direction of flow, elevation, orientation,

insertion depth, and other applicable considerations. 4. Check instrument tubing for proper fittings, slope, material, and support. 5. Check pressure instruments, piping slope, installation of valve manifold,

and self-contained pressure regulators. 6. Check temperature instruments and material and length of sensing

elements. 7. Check DDC system as follows:

a. Verify that DDC controller power supply is from emergency power supply, if applicable.

b. Verify that wires at control panels are tagged with their service designation and approved tagging system.

c. Verify that spare I/O capacity has been provided. d. Verify that DDC controllers are protected from power supply surges.

D. Replace damaged or malfunctioning controls and equipment and repeat testing procedures.

3.4 DEMONSTRATION

A. Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain HVAC instrumentation and controls. Refer to Division 01 Section "Demonstration and Training."


SEQUENCE OF OPERATIONS FOR HVAC CONTROLS 230993 - 1 East Fairmont Middle School

SECTION 230993 - SEQUENCE OF OPERATIONS FOR HVAC CONTROL

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes control sequences for the Automatic Temperature Control system and related systems.

B. Related Sections include the following:

1. Division 23 Section "Automatic Temperature Control System". 2. Division 23, Mechanical Equipment Specifications.

C. Provide all devices and sensors as required to perform the alarms and sequences of operations described herein.

1.2 DEFINITIONS

A. DDC: Direct-digital Controls.

B. ERV: Energy Recovery Ventilator.

C. LCD: Liquid crystal display.

D. VRF: Variable refrigerant flow

E. RTU: Rooftop HVAC unit

1.3 ENERGY RECOVERY VENTILATORS

A. Work station graphical display: Indicate the following:

1. Occupied mode 2. Fan status. 3. ERV leaving supply and exhaust air temperature. 4. ERV leaving air humidity. 5. ERV return air temperature. 6. Wheel rotation failure alarm.

B. During occupied time period, the energy recovery ventilation unit (ERV) shall run continuously. During unoccupied time period, the ERV shall be shut down and outdoor and exhaust dampers shall close.


C. Packaged controls shall rotate heat transfer wheel at a constant speed when the unit is running. These controls will stop the wheel when outside air conditions are suitable for free cooling.

D. The packaged controls will energize the electrical preheating coil when outdoor air temperature is below setpoint.

E. The post heaters shall be cycled in stages by the DDC system to maintain a min-imum discharge air temperature whenever the outdoor air temperature is below a prescribed setpoint.

F. In summer mode, unit shall be locked out. Energize ERV if any room served by the ERV is over-ridden to occupied mode.

G. In “Shelter-in-place” mode, shut down ERV and close outdoor air damper.

H. Shut down ERV units upon activation of general fire alarm.

1.4 EXHAUST FANS


1. Occupied status. 2. Fan status

B. Range hood exhaust fan shall be energized by local switch. Fan shall also run when cafeteria is in occupied mode.

C. Interface fan controls with range hood fire extinguishing system and provide re-quired operation.

1.5 ROOFTOP HVAC UNITS

A. Run indoor fan continuously on occupied cycle. Cycle fan as required to main-tain unoccupied room temperature setpoint.

B. Open outside air damper to minimum position on occupied cycle. Modulate out-door air damper on occupied cycle to maintain setting of carbon dioxide sensor.

C. Package unit controls shall cycle refrigeration and stage gas heating controls in sequence to maintain desired room temperature setpoint. Lock out reverse cycle heating mode and/or stages of heating when commanded by demand control strategy.

D. Package unit controls shall modulate economizer controls in cooling mode when outdoor enthalpy is less than return air enthalpy.


E. Close outdoor air dampers during morning warm-up and morning cool-down cy-cle.

F. Close outdoor air dampers and shut down unit in “shelter in place” mode.

G. Open outdoor air dampers on cafeteria units when range hood exhaust fans are started.

H. Shut down roof top units on activation of general fire alarm.

I. Shut down rooftop units on smoke detection where so equipped.

J. Work station graphical display: Indicate the following:

1. Occupied mode 2. Fan status. 3. Leaving air temperature. 4. Room air temperature. 6. Room temperature setpoint and low room temperature alarm. 7. Low mixed air temperature alarm.

1.6 VRF SYSTEM CONDENSING UNITS

A. Energize condensing unit during occupied cycle and as required to maintain set-up and setback temperatures during unoccupied cycle..

B. Cycle refrigeration controls as required to satisfy demand of indoor units.

C. Modulate first compressor up to 50% of unit capacity. Run second compressor at constant speed and modulate first compressor up to 100% of unit capacity.

D. Work station graphical display: Indicate the following:

1. Occupied mode 2. Equipment status. 3. Compressor failure alarm.

1.7 VRF SYSTEM INDOOR UNITS


1. Occupied status. 2. Room temperature 3. Room temperature setpoint and low room temperature alarm.


B. Room side fans shall run continuously during occupied time period. Cycle fan as required during unoccupied cycle to maintain unoccupied setpoints.

C. Package unit controls shall cycle refrigeration system as required to maintain room temperature setpoint.

D. Maintain night setback and setup temperatures during unoccupied cycle.

1.8 UNIT HEATERS AND ELECTRIC HEATERS

A. Heaters shall have their own control independent of DDC system.

1.9 GLOBAL INPUTS


1. Outdoor temperature. 2. Outdoor humidity. 3. Occupied/unoccupied schedules. 4. Shelter-in-place activation switch. 5. General fire alarm activation.

1.10 ELECTRICAL POWER DEMAND CONTROL


1. Measured demand 2. Demand limit setpoint

B. Provide demand measurement over 15 minute period or as otherwise required to conform to power company billing schedule

C. Cycle HVAC electrical loads in accordance with demand control strategy to limit billed demand charges.

D. Demand control strategy shall not compromise long term occupant comfort, air quality or life safety. Do not over-ride low-limit controls.

PART 2 - PRODUCTS (Not Applicable)

PART 3 - EXECUTION (Not Applicable)


NATURAL-GAS PIPING 231123 - 1 East Fairmont Middle School

SECTION 231123 - NATURAL-GAS PIPING

PART 1 - GENERAL

1.1 SUMMARY


1. Pipes, tubes, and fittings. 2. Piping specialties. 3. Piping and tubing joining materials. 4. Valves.


A. Minimum Operating-Pressure Ratings:

1. Piping and Valves: 100 psig minimum unless otherwise indicated. 2. Service Regulators: 100 psig minimum unless otherwise indicated.

B. Natural-Gas System Pressure within Buildings: 0.5 psig or less

1.3 SUBMITTALS



C. Field quality-control reports.

D. Operation and maintenance data.


A. Steel Support Welding Qualifications: Qualify procedures and personnel according to AWS D1.1/D1.1M, "Structural Welding Code - Steel."

B. Pipe Welding Qualifications: Qualify procedures and operators according to ASME Boiler and Pressure Vessel Code.

C. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.


PART 2 - PRODUCTS

2.1 PIPES, TUBES, AND FITTINGS

A. Steel Pipe: ASTM A 53/A 53M, black steel, Schedule 40, Type E or S, Grade B.

1. Malleable-Iron Threaded Fittings: ASME B16.3, Class 150, standard pattern.

2. Wrought-Steel Welding Fittings: ASTM A 234/A 234M for butt welding and socket welding.

3. Unions: ASME B16.39, Class 150, malleable iron with brass-to-iron seat, ground joint, and threaded ends.

2.2 PIPING SPECIALTIES

A. Appliance Flexible Connectors:

1. Indoor, Fixed-Appliance Flexible Connectors: Comply with ANSI Z21.24. 2. Indoor, Movable-Appliance Flexible Connectors: Comply with

ANSI Z21.69. 3. Outdoor, Appliance Flexible Connectors: Comply with ANSI Z21.75. 4. Corrugated stainless-steel tubing with polymer coating. 5. Operating-Pressure Rating: 0.5 psig. 6. End Fittings: Zinc-coated steel. 7. Threaded Ends: Comply with ASME B1.20.1. 8. Maximum Length: 72 inches.

B. Quick-Disconnect Devices: Comply with ANSI Z21.41.

1. Copper-alloy convenience outlet and matching plug connector. 2. Nitrile seals. 3. Hand operated with automatic shutoff when disconnected. 4. For indoor or outdoor applications. 5. Adjustable, retractable restraining cable.

2.3 JOINING MATERIALS

A. Joint Compound and Tape: Suitable for natural gas.

2.4 MANUAL GAS SHUTOFF VALVES

A. Manufacturers:


1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

a. Crane Co.; Crane Valve Group; Crane Valves. b. Crane Co.; Crane Valve Group; Jenkins Valves. c. DynaQuip Controls. d. Flow-Tek, Inc.; a subsidiary of Bray International, Inc. e. Hammond Valve. f. Jamesbury; a subsidiary of Metso Automation. g. NIBCO INC. h. Red-White Valve Corporation.

B. General Requirements for Metallic Valves, NPS 2 and Smaller: Comply with ASME B16.33.

1. CWP Rating: 125 psig. 2. Threaded Ends: Comply with ASME B1.20.1. 3. Dryseal Threads on Flare Ends: Comply with ASME B1.20.3. 4. Listing: Listed and labeled by an NRTL acceptable to authorities having

jurisdiction for valves 1 inch and smaller. 5. Service Mark: Valves 1-1/4 inches to NPS 2 shall have initials "WOG"

permanently marked on valve body.

C. One-Piece, Bronze Ball Valve with Bronze Trim: MSS SP-110.

1. Body: Bronze, complying with ASTM B 584. 2. Ball: Chrome-plated brass. 3. Stem: Bronze; blowout proof. 4. Seats: Reinforced TFE; blowout proof. 5. Packing: Separate packnut with adjustable-stem packing threaded ends. 6. Ends: Threaded, flared, or socket as indicated in "Underground Manual

Gas Shutoff Valve Schedule" and "Aboveground Manual Gas Shutoff Valve Schedule" Articles.

7. CWP Rating: 600 psig. 8. Listing: Valves NPS 1 and smaller shall be listed and labeled by an NRTL

acceptable to authorities having jurisdiction. 9. Service: Suitable for natural-gas service with "WOG" indicated on valve

body.

D. Two-Piece, Full-Port, Bronze Ball Valves with Bronze Trim: MSS SP-110.

1. Body: Bronze, complying with ASTM B 584. 2. Ball: Chrome-plated bronze. 3. Stem: Bronze; blowout proof. 4. Seats: Reinforced TFE; blowout proof. 5. Packing: Threaded-body packnut design with adjustable-stem packing.


6. Ends: Threaded, flared, or socket as indicated in "Underground Manual Gas Shutoff Valve Schedule" and "Aboveground Manual Gas Shutoff Valve Schedule" Articles.

7. CWP Rating: 600 psig. 8. Listing: Valves NPS 1 and smaller shall be listed and labeled by an NRTL

acceptable to authorities having jurisdiction. 9. Service: Suitable for natural-gas service with "WOG" indicated on valve

body.

E. Bronze Plug Valves: MSS SP-78.

PART 3 - EXECUTION

3.1 INDOOR PIPING INSTALLATION

A. Comply with the International Fuel Gas Code for installation and purging of natural-gas piping.

B. Drawing plans, schematics, and diagrams indicate general location and arrangement of piping systems. Indicated locations and arrangements are used to size pipe and calculate friction loss, expansion, and other design considerations. Install piping as indicated unless deviations to layout are approved on Coordination Drawings.

C. Arrange for pipe spaces, chases, slots, sleeves, and openings in building structure during progress of construction, to allow for mechanical installations.

D. Install piping indicated to be exposed and piping in equipment rooms and service areas at right angles or parallel to building walls. Diagonal runs are prohibited unless specifically indicated otherwise.

E. Locate valves for easy access.

F. Install natural-gas piping at uniform grade of 2 percent down toward drip and sediment traps.

G. Install piping free of sags and bends.

H. Install fittings for changes in direction and branch connections.

I. Verify final equipment locations for roughing-in.

J. Comply with requirements in Sections specifying gas-fired appliances and equipment for roughing-in requirements.


K. Drips and Sediment Traps: Install drips at points where condensate may collect, including service-meter outlets. Locate where accessible to permit cleaning and emptying. Do not install where condensate is subject to freezing.

1. Construct drips and sediment traps using tee fitting with bottom outlet plugged or capped. Use nipple a minimum length of 3 pipe diameters, but not less than 3 inches long and same size as connected pipe. Install with space below bottom of drip to remove plug or cap.

L. Extend relief vent connections for service regulators, line regulators, and overpressure protection devices to outdoors and terminate with weatherproof vent cap.

M. Conceal pipe installations in walls, pipe spaces, utility spaces, above ceilings, below grade or floors, and in floor channels unless indicated to be exposed to view.

N. Use eccentric reducer fittings to make reductions in pipe sizes. Install fittings with level side down.

O. Connect branch piping from top or side of horizontal piping.

P. Install unions in pipes NPS 2 and smaller, adjacent to each valve, at final connection to each piece of equipment.

Q. Do not use natural-gas piping as grounding electrode.

R. Install strainer on inlet of each line-pressure regulator and automatic or electrically operated valve.

S. Install sleeves for piping penetrations of walls, ceilings, and floors. Comply with requirements for sleeves specified in Division 23 Section "Sleeves and Sleeve Seals for HVAC Piping."

T. Install sleeve seals for piping penetrations of concrete walls and slabs. Comply with requirements for sleeve seals specified in Division 23 Section "Sleeves and Sleeve Seals for HVAC Piping."

U. Install escutcheons for piping penetrations of walls, ceilings, and floors. Comply with requirements for escutcheons specified in Division 23 Section "Escutcheons for HVAC Piping."

3.2 VALVE INSTALLATION

A. Install manual gas shutoff valve for each gas appliance ahead of corrugated stainless-steel tubing or copper connector.


B. Install regulators and overpressure protection devices with maintenance access space adequate for servicing and testing.

3.3 PIPING JOINT CONSTRUCTION

A. Ream ends of pipes and tubes and remove burrs.

B. Remove scale, slag, dirt, and debris from inside and outside of pipe and fittings before assembly.

C. Threaded Joints:

1. Thread pipe with tapered pipe threads complying with ASME B1.20.1. 2. Cut threads full and clean using sharp dies. 3. Ream threaded pipe ends to remove burrs and restore full inside diameter

of pipe. 4. Apply appropriate tape or thread compound to external pipe threads

unless dryseal threading is specified. 5. Damaged Threads: Do not use pipe or pipe fittings with threads that are

corroded or damaged. Do not use pipe sections that have cracked or open welds.


A. Comply with requirements for pipe hangers and supports specified in Division 23 Section "Hangers and Supports for HVAC Piping and Equipment."

B. Install hangers for horizontal steel piping with the following maximum spacing and minimum rod sizes:

1. NPS 1 and Smaller: Maximum span, 96 inches; minimum rod size, 3/8 inch.

2. NPS 1-1/4: Maximum span, 108 inches; minimum rod size, 3/8 inch. 3. NPS 1-1/2, 2 and NPS 3: Maximum span, 108 inches; minimum rod size,

3/8 inch.

3.5 CONNECTIONS

A. Install natural-gas piping electrically continuous, and bonded to gas appliance equipment grounding conductor of the circuit powering the appliance according to NFPA 70.

B. Install piping adjacent to appliances to allow service and maintenance of appliances.


C. Connect piping to appliances using manual gas shutoff valves and unions. Install valve within 72 inches of each gas-fired appliance and equipment. Install union between valve and appliances or equipment.

D. Sediment Traps: Install tee fitting with capped nipple in bottom to form drip, as close as practical to inlet of each appliance.

3.6 LABELING AND IDENTIFYING

A. Comply with requirements in Division 23 Section "Identification for HVAC Piping and Equipment" for piping and valve identification.

B. Install detectable warning tape directly above gas piping, 12 inches below finished grade, except 6 inches below subgrade under pavements and slabs.


A. Test, inspect, and purge natural gas according to the International Fuel Gas Code and authorities having jurisdiction.

B. Natural-gas piping will be considered defective if it does not pass tests and inspections.

C. Prepare test and inspection reports.

3.8 INDOOR PIPING SCHEDULE

A. Aboveground, branch piping shall be the following: 1. Steel pipe with malleable-iron fittings and threaded joints.

B. Aboveground, distribution piping shall be the following:

1. Steel pipe with malleable-iron fittings and threaded joints.

3.9 ABOVEGROUND MANUAL GAS SHUTOFF VALVE SCHEDULE

A. Valves at service meter shall be the following: 1. Bronze plug valve.

B. Distribution piping valves for pipe sizes NPS 2 and smaller shall be the following:

1. One-piece, bronze ball valve with bronze trim. 2. Two-piece, full-port, bronze ball valves with bronze trim. 3. Bronze plug valve.


C. Valves in branch piping for single appliance shall be one of the following:

1. One-piece, bronze ball valve with bronze trim. 2. Two-piece, full-port, bronze ball valves with bronze trim. 3. Bronze plug valve.


REFRIGERANT PIPING 232300 - 1 East Fairmont Middle School

SECTION 232300 - REFRIGERANT PIPING

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes refrigerant piping used for air-conditioning applications.


A. Line Test Pressure for Refrigerant:

1. Suction Lines for Air-Conditioning Applications: 185 psig. 2. Suction Lines for Heat-Pump Applications: 325 psig. 3. Hot-Gas and Liquid Lines: 325 psig.

1.3 ACTION SUBMITTALS

A. Product Data: For each type of valve and refrigerant piping specialty indicated. Include pressure drop based on manufacturer's test data.

B. Shop Drawings: Show layout of refrigerant piping and specialties, including pipe, tube, and fitting sizes, flow capacities, valve arrangements and locations, slopes of horizontal runs, oil traps, double risers, wall and floor penetrations, and equipment connection details. Show interface and spatial relationships between piping and equipment.

1. Refrigerant piping indicated on Drawings is schematic only. Size piping and design actual piping layout, including oil traps, double risers, specialties, and pipe and tube sizes to accommodate, as a minimum, equipment provided, elevation difference between compressor and evaporator, and length of piping to ensure proper operation and compliance with warranties of connected equipment.

1.4 INFORMATIONAL SUBMITTALS

A. Field quality-control test reports.

1.5 CLOSEOUT SUBMITTALS

A. Operation and maintenance data.



A. Comply with ASHRAE 15, "Safety Code for Refrigeration Systems."

B. Comply with ASME B31.5, "Refrigeration Piping and Heat Transfer Components."

1.7 PRODUCT STORAGE AND HANDLING

A. Store piping in a clean and protected area with end caps in place to ensure that piping interior and exterior are clean when installed.

PART 2 - PRODUCTS

2.1 COPPER TUBE AND FITTINGS

A. Copper Tube: ASTM B 280, Type ACR.

B. Wrought-Copper Fittings: ASME B16.22.

C. Wrought-Copper Unions: ASME B16.22.

D. Solder Filler Metals: ASTM B 32. Use 95-5 tin antimony or alloy HB solder to join copper socket fittings on copper pipe.

E. Brazing Filler Metals: AWS A5.8.

F. Flexible Connectors:

1. Body: Tin-bronze bellows with woven, flexible, tinned-bronze-wire-reinforced protective jacket.

2. End Connections: Socket ends. 3. Offset Performance: Capable of minimum 3/4-inch misalignment in

minimum 7-inch- long assembly. 4. Pressure Rating: Factory test at minimum 500 psig. 5. Maximum Operating Temperature: 250 deg F.

2.2 VALVES AND SPECIALTIES

A. Diaphragm Packless Valves:

1. Body and Bonnet: Forged brass or cast bronze; globe design with straight-through or angle pattern.

2. Diaphragm: Phosphor bronze and stainless steel with stainless-steel spring.


3. Operator: Rising stem and hand wheel. 4. Seat: Nylon. 5. End Connections: Socket, union, or flanged. 6. Working Pressure Rating: 500 psig. 7. Maximum Operating Temperature: 275 deg F.

B. Packed-Angle Valves:

1. Body and Bonnet: Forged brass or cast bronze. 2. Packing: Molded stem, back seating, and replaceable under pressure. 3. Operator: Rising stem. 4. Seat: Nonrotating, self-aligning polytetrafluoroethylene. 5. Seal Cap: Forged-brass or valox hex cap. 6. End Connections: Socket, union, threaded, or flanged. 7. Working Pressure Rating: 500 psig. 8. Maximum Operating Temperature: 275 deg F.

C. Check Valves:

1. Body: Ductile iron, forged brass, or cast bronze; globe pattern. 2. Bonnet: Bolted ductile iron, forged brass, or cast bronze; or brass hex

plug. 3. Piston: Removable polytetrafluoroethylene seat. 4. Closing Spring: Stainless steel. 5. Manual Opening Stem: Seal cap, plated-steel stem, and graphite seal. 6. End Connections: Socket, union, threaded, or flanged. 7. Maximum Opening Pressure: 0.50 psig. 8. Working Pressure Rating: 500 psig. 9. Maximum Operating Temperature: 275 deg F.

D. Service Valves:

1. Body: Forged brass with brass cap including key end to remove core. 2. Core: Removable ball-type check valve with stainless-steel spring. 3. Seat: Polytetrafluoroethylene. 4. End Connections: Copper spring. 5. Working Pressure Rating: 500 psig.

E. Straight-Type Strainers:

1. Body: Welded steel with corrosion-resistant coating. 2. Screen: 100-mesh stainless steel. 3. End Connections: Socket or flare. 4. Working Pressure Rating: 500 psig. 5. Maximum Operating Temperature: 275 deg F.

F. Angle-Type Strainers:


1. Body: Forged brass or cast bronze. 2. Drain Plug: Brass hex plug. 3. Screen: 100-mesh monel. 4. End Connections: Socket or flare. 5. Working Pressure Rating: 500 psig. 6. Maximum Operating Temperature: 275 deg F.

PART 3 - EXECUTION

3.1 PIPING APPLICATIONS

A. Suction Lines: Copper, Type ACR, annealed-temper tubing and wrought-copper fittings with joints.

B. Hot-Gas and Liquid Lines, and Suction Lines for Heat-Pump Applications: Copper, Type ACR, annealed-temper tubing and wrought-copper fittings with brazed joints.

3.2 VALVE AND SPECIALTY APPLICATIONS

A. Install valves in suction and discharge lines of compressor.

B. Install service valves for gage taps at strainers if they are not an integral part of strainers.

C. Install a check valve at the compressor discharge and a liquid accumulator at the compressor suction connection.

D. Except as otherwise indicated, install valves on inlet and outlet side of filter dryers.

E. Install safety relief valves where required by ASME Boiler and Pressure Vessel Code. Pipe safety-relief-valve discharge line to outside according to ASHRAE 15.

F. Install strainers upstream from and adjacent to the following unless they are furnished as an integral assembly for device being protected:

1. Solenoid valves. 2. Thermostatic expansion valves. 3. Compressor.

G. Install flexible connectors at compressors.


3.3 PIPING INSTALLATION

A. Drawing plans, schematics, and diagrams indicate general location and arrangement of piping systems; indicated locations and arrangements were used to size pipe and calculate friction loss, expansion, pump sizing, and other design considerations. Install piping as indicated unless deviations to layout are approved on Shop Drawings.

B. Install refrigerant piping according to ASHRAE 15.

C. Install piping in concealed locations unless otherwise indicated and except in equipment rooms and service areas.

D. Install piping indicated to be exposed and piping in equipment rooms and service areas at right angles or parallel to building walls. Diagonal runs are prohibited unless specifically indicated otherwise.

E. Install piping above accessible ceilings to allow sufficient space for ceiling panel removal.

F. Install piping adjacent to machines to allow service and maintenance.

G. Install piping free of sags and bends.

H. Install fittings for changes in direction and branch connections.

I. Select system components with pressure rating equal to or greater than system operating pressure.

J. Install piping as short and direct as possible, with a minimum number of joints, elbows, and fittings.

K. Arrange piping to allow inspection and service of refrigeration equipment. Install valves and specialties in accessible locations to allow for service and inspection.

L. Slope refrigerant piping as follows:

1. Install horizontal hot-gas discharge piping with a uniform slope downward away from compressor.

2. Install horizontal suction lines with a uniform slope downward to compressor.

3. Install traps and double risers to entrain oil in vertical runs. 4. Liquid lines may be installed level.

M. When brazing or soldering, remove solenoid-valve coils and sight glasses; also remove valve stems, seats, and packing, and accessible internal parts of refrigerant specialties. Do not apply heat near expansion-valve bulb.


N. Install piping with adequate clearance between pipe and adjacent walls and hangers or between pipes for insulation installation.

O. Identify refrigerant piping and valves according to Section 230553 "Identification for HVAC Piping and Equipment."

P. Install sleeves for piping penetrations of walls, ceilings, and floors. Comply with requirements for sleeves specified in Section 230517 "Sleeves and Sleeve Seals for HVAC Piping."

Q. Install sleeve seals for piping penetrations of concrete walls and slabs. Comply with requirements for sleeve seals specified in Section 230517 "Sleeves and Sleeve Seals for HVAC Piping."

R. Install escutcheons for piping penetrations of walls, ceilings, and floors. Comply with requirements for escutcheons specified in Section 230518 "Escutcheons for HVAC Piping."

3.4 PIPE JOINT CONSTRUCTION

A. Soldered Joints: Construct joints according to ASTM B 828 or CDA's "Copper Tube Handbook."

B. Brazed Joints: Construct joints according to AWS's "Brazing Handbook," Chapter "Pipe and Tube."

1. Use Type BcuP, copper-phosphorus alloy for joining copper socket fittings with copper pipe.

2. Use Type BAg, cadmium-free silver alloy for joining copper with bronze or steel.

3.5 HANGERS AND SUPPORTS

A. Hanger, support, and anchor products are specified in Section 230529 "Hangers and Supports for HVAC Piping and Equipment."

B. Install the following pipe attachments:

1. Adjustable steel clevis hangers for individual horizontal runs less than 20 feet long.

2. Roller hangers and spring hangers for individual horizontal runs 20 feet or longer.

3. Pipe Roller: MSS SP-58, Type 44 for multiple horizontal piping 20 feet or longer, supported on a trapeze.

4. Spring hangers to support vertical runs.


5. Copper-clad hangers and supports for hangers and supports in direct contact with copper pipe.

C. Install hangers for copper tubing with the following maximum spacing and minimum rod sizes:

1. NPS 1/2: Maximum span, 60 inches; minimum rod size, 1/4 inch. 2. NPS 5/8: Maximum span, 60 inches; minimum rod size, 1/4 inch. 3. NPS 1: Maximum span, 72 inches; minimum rod size, 1/4 inch. 4. NPS 1-1/4: Maximum span, 96 inches; minimum rod size, 3/8 inch. 5. NPS 1-1/2: Maximum span, 96 inches; minimum rod size, 3/8 inch. 6. NPS 2: Maximum span, 96 inches; minimum rod size, 3/8 inch. 7. NPS 2-1/2: Maximum span, 108 inches; minimum rod size, 3/8 inch. 8. NPS 3: Maximum span, 10 feet; minimum rod size, 3/8 inch. 9. NPS 4: Maximum span, 12 feet; minimum rod size, 1/2 inch.

D. Support multifloor vertical runs at least at each floor.


A. Perform tests and inspections and prepare test reports.

B. Tests and Inspections:

1. Comply with ASME B31.5, Chapter VI. 2. Test refrigerant piping and specialties. Isolate compressor, condenser,

evaporator, and safety devices from test pressure if they are not rated above the test pressure.

3. Test high- and low-pressure side piping of each system separately at not less than the pressures indicated in Part 1 "Performance Requirements" Article.

a. Fill system with nitrogen to the required test pressure. b. System shall maintain test pressure at the manifold gage throughout

duration of test. c. Test joints and fittings with electronic leak detector or by brushing a

small amount of soap and glycerin solution over joints. d. Remake leaking joints using new materials, and retest until

satisfactory results are achieved.

3.7 SYSTEM CHARGING

A. Charge system using the following procedures:

1. Install core in filter dryers after leak test but before evacuation.


2. Evacuate entire refrigerant system with a vacuum pump to 500 micrometers. If vacuum holds for 12 hours, system is ready for charging.

3. Break vacuum with refrigerant gas, allowing pressure to build up to 2 psig. 4. Charge system with a new filter-dryer core in charging line.


METAL DUCTS 233113 - 1 East Fairmont Middle School

SECTION 233113 - METAL DUCTS

PART 1 - GENERAL

1.1 SUMMARY


1. Rectangular ducts and fittings. 2. Round ducts and fittings. 3. Sheet metal materials. 4. Sealants and gaskets. 5. Hangers and supports. 6. Duct liner.

B. Related Sections: 1. Division 23 Section "Air Duct Accessories" for dampers, duct-mounting

access doors and panels, turning vanes, and flexible ducts.


A. Delegated Duct Design: Duct construction, including sheet metal thicknesses, seam and joint construction, reinforcements, and hangers and supports, shall comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible".

B. Structural Performance: Duct hangers and supports shall withstand the effects of gravity loads and stresses within limits and under conditions described in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible"

C. Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in ASHRAE 62.1.

1.3 SUBMITTALS




A. Welding Qualifications: Qualify procedures and personnel according to the following:


1. AWS D1.1/D1.1M, "Structural Welding Code - Steel," for hangers and supports.

2. AWS D1.2/D1.2M, "Structural Welding Code - Aluminum," for aluminum supports.

3. AWS D9.1M/D9.1, "Sheet Metal Welding Code," for duct joint and seam welding.

PART 2 - PRODUCTS

2.1 RECTANGULAR DUCTS AND FITTINGS

A. General Fabrication Requirements: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" based on indicated static-pressure class unless otherwise indicated.

B. Transverse Joints: Select joint types and fabricate according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Figure 2-1, "Rectangular Duct/Transverse Joints," for static-pressure class, applicable sealing requirements, materials involved, duct-support intervals, and other provisions in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."

C. Longitudinal Seams: Select seam types and fabricate according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Figure 2-2, "Rectangular Duct/Longitudinal Seams," for static-pressure class, applicable sealing requirements, materials involved, duct-support intervals, and other provisions in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."

D. Elbows, Transitions, Offsets, Branch Connections, and Other Duct Construction: Select types and fabricate according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Chapter 4, "Fittings and Other Construction," for static-pressure class, applicable sealing requirements, materials involved, duct-support intervals, and other provisions in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."

2.2 ROUND DUCTS AND FITTINGS

A. General Fabrication Requirements: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Chapter 3, "Round, Oval, and Flexible Duct," based on indicated static-pressure class unless otherwise indicated.

B. Transverse Joints: Select joint types and fabricate according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Figure 3-1, "Round


Duct Transverse Joints," for static-pressure class, applicable sealing requirements, materials involved, duct-support intervals, and other provisions in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."

C. Longitudinal Seams: Select seam types and fabricate according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Figure 3-2, "Round Duct Longitudinal Seams," for static-pressure class, applicable sealing requirements, materials involved, duct-support intervals, and other provisions in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."

D. Tees and Laterals: Select types and fabricate according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Figure 3-5, "90 Degree Tees and Laterals," and Figure 3-6, "Conical Tees," for static-pressure class, applicable sealing requirements, materials involved, duct-support intervals, and other provisions in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."

2.3 SHEET METAL MATERIALS

A. General Material Requirements: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" for acceptable materials, material thicknesses, and duct construction methods unless otherwise indicated. Sheet metal materials shall be free of pitting, seam marks, roller marks, stains, discolorations, and other imperfections.

B. Galvanized Sheet Steel: Comply with ASTM A 653/A 653M.

1. Galvanized Coating Designation: G60. 2. Finishes for Surfaces Exposed to View: Mill phosphatized.

C. Carbon-Steel Sheets: Comply with ASTM A 1008/A 1008M, with oiled, matte finish for exposed ducts.

D. Stainless-Steel Sheets: Comply with ASTM A 480/A 480M, Type 304 or 316, as indicated in the "Duct Schedule" Article; cold rolled, annealed, sheet.

E. Aluminum Sheets: Comply with ASTM B 209 Alloy 3003, H14 temper; with mill finish for concealed ducts, and standard, one-side bright finish for duct surfaces exposed to view.

F. Reinforcement Shapes and Plates: ASTM A 36/A 36M, steel plates, shapes, and bars; black and galvanized.

1. Where black- and galvanized-steel shapes and plates are used to reinforce aluminum ducts, isolate the different metals with butyl rubber, neoprene, or EPDM gasket materials.


G. Tie Rods: Galvanized steel, 1/4-inch minimum diameter for lengths 36 inches or less; 3/8-inch minimum diameter for lengths longer than 36 inches.

2.4 SEALANT AND GASKETS

A. General Sealant and Gasket Requirements: Surface-burning characteristics for sealants and gaskets shall be a maximum flame-spread index of 25 and a maximum smoke-developed index of 50 when tested according to UL 723; certified by an NRTL.

A. Manufacturers:


a. Durodyne b. Foster Products c. United Duct Seal

B. Two-Part Tape Sealing System:

1. Tape: Woven cotton fiber impregnated with mineral gypsum and modified acrylic/silicone activator to react exothermically with tape to form hard, durable, airtight seal.

2. Tape Width:[3 inches] [4 inches] [6 inches]. 3. Sealant: Modified styrene acrylic. 4. Water resistant. 5. Mold and mildew resistant. 6. Maximum Static-Pressure Class: 10-inch wg, positive and negative. 7. Service: Indoor and outdoor. 8. Service Temperature: Minus 40 to plus 200 deg F. 9. Substrate: Compatible with galvanized sheet steel (both PVC coated and

bare), stainless steel, or aluminum. 10. For indoor applications, use sealant that has a VOC content of 250 g/L or

less when calculated according to 40 CFR 59, Subpart D (EPA Method 24).

11. Sealant shall comply with the testing and product requirements of the California Department of Health Services' "Standard Practice for the Testing of Volatile Organic Emissions from Various Sources Using Small-Scale Environmental Chambers."

C. Water-Based Joint and Seam Sealant:

1. Application Method: Brush on.


2. Solids Content: Minimum 65 percent. 3. Shore A Hardness: Minimum 20. 4. Water resistant. 5. Mold and mildew resistant. 6. VOC: Maximum 75 g/L (less water). 7. Maximum Static-Pressure Class: 10-inch wg, positive and negative. 8. Service: Indoor or outdoor. 9. Substrate: Compatible with galvanized sheet steel (both PVC coated and

bare), stainless steel, or aluminum sheets.

2.5 HANGERS AND SUPPORTS

A. Hanger Rods for Noncorrosive Environments: Cadmium-plated steel rods and nuts.

B. Strap and Rod Sizes: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Table 5-1, "Rectangular Duct Hangers Minimum Size," and Table 5-2, "Minimum Hanger Sizes for Round Duct."

C. Steel Cables for Galvanized-Steel Ducts: Galvanized steel complying with ASTM A 603.

D. Steel Cables for Stainless-Steel Ducts: Stainless steel complying with ASTM A 492.

E. Steel Cable End Connections: Cadmium-plated steel assemblies with brackets, swivel, and bolts designed for duct hanger service; with an automatic-locking and clamping device.

F. Duct Attachments: Sheet metal screws, blind rivets, or self-tapping metal screws; compatible with duct materials.

G. Trapeze and Riser Supports:

1. Supports for Galvanized-Steel Ducts: Galvanized-steel shapes and plates.

2. Supports for Stainless-Steel Ducts: Stainless-steel shapes and plates. 3. Supports for Aluminum Ducts: Aluminum or galvanized steel coated with

zinc chromate.

2.6 DUCT LINER

A. Manufacturers:



a. Industrial Noise Control b. John Manville c. Owens Corning

B. General: Comply with NFPA 90A and NAIMA's "Fibrous Glass Duct Liner Standard."

C. Materials: ASTM C 1071 with coated surface exposed to airstream to prevent erosion of glass fibers. 1. Thickness: 1 inch (25 mm). 2. Thermal Conductivity (k-Value): 0.26 at 75 deg F (0.037 at 24 deg C)

mean temperature. 3. Fire-Hazard Classification: Maximum flame-spread rating of 25 and

smoke-developed rating of 50, when tested according to ASTM C 411. 4. Liner Adhesive: Comply with NFPA 90A or NFPA 90B and ASTM C 916. 5. Mechanical Fasteners: Galvanized steel, suitable for adhesive

attachment, mechanical attachment, or welding attachment to duct without damaging liner when applied as recommended by manufacturer and without causing leakage in duct.

a. Tensile Strength: Indefinitely sustain a 50-lb- (23-kg-) tensile, dead-load test perpendicular to duct wall.

b. Fastener Pin Length: As required for thickness of insulation and without projecting more than 1/8 inch (3 mm) into airstream.

c. Adhesive for Attaching Mechanical Fasteners: Comply with fire-hazard classification of duct liner system.

6. Duct liner shall be rated for a minimum velocity of 5000 fpm amd be treated with an EPA approved antimicrobial agent proven to resist microbial growth as determined by ASTM G21 and G22.

2.7 SHOP APPLICATION OF LINER IN RECTANGULAR DUCTS

A. Adhere a single layer of indicated thickness of duct liner with 90 percent coverage of adhesive at liner contact surface area. Multiple layers of insulation to achieve indicated thickness are prohibited.

B. Apply adhesive to liner facing in direction of airflow not receiving metal nosing.

C. Butt transverse joints without gaps and coat joint with adhesive.

D. Fold and compress liner in corners of rectangular ducts or cut and fit to ensure butted-edge overlapping.


E. Do not apply liners in rectangular ducts with longitudinal joints, except at corners of ducts, unless duct size and standard liner product dimensions make longitudinal joints necessary.

F. Apply adhesive coating on longitudinal seams in ducts with air velocity of 2500 fpm (12.7 m/s).

G. Secure liner with mechanical fasteners 4 inches (100 mm) from corners and at intervals not exceeding 12 inches (300 mm) transversely around perimeter; at 3 inches (75 mm) from transverse joints and at intervals not exceeding 18 inches (450 mm) longitudinally.

H. Secure transversely oriented liner edges facing the airstream with metal nosings that have either channel or "Z" profile or are integrally formed from duct wall. Fabricate edge facings at the following locations:

1. Fan discharge. 2. Intervals of lined duct preceding unlined duct. 3. Upstream edges of transverse joints in ducts.

PART 3 - EXECUTION

3.1 DUCT INSTALLATION

A. Drawing plans, schematics, and diagrams indicate general location and arrangement of duct system. Indicated duct locations, configurations, and arrangements were used to size ducts and calculate friction loss for air-handling equipment sizing and for other design considerations. Install duct systems as indicated unless deviations to layout are approved on Shop Drawings and Coordination Drawings.

B. Install ducts according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" unless otherwise indicated.

C. Install round ducts in maximum practical lengths.

D. Install ducts with fewest possible joints.

E. Install factory- or shop-fabricated fittings for changes in direction, size, and shape and for branch connections.

F. Unless otherwise indicated, install ducts vertically and horizontally, and parallel and perpendicular to building lines.


G. Install ducts close to walls, overhead construction, columns, and other structural and permanent enclosure elements of building.

H. Install ducts with a clearance of 1 inch, plus allowance for insulation thickness.

I. Route ducts to avoid passing through transformer vaults and electrical equipment rooms and enclosures.

J. Where ducts pass through non-fire-rated interior partitions and exterior walls and are exposed to view, cover the opening between the partition and duct or duct insulation with sheet metal flanges of same metal thickness as the duct. Overlap openings on four sides by at least 1-1/2 inches.

K. Where ducts pass through fire-rated interior partitions and exterior walls, install fire dampers where indicated. Comply with requirements in Division 23 Section "Air Duct Accessories" for fire and smoke dampers.

L. Protect duct interiors from moisture, construction debris and dust, and other foreign materials.

3.2 DUCT SEALING

A. Seal ducts for duct static-pressure, seal classes, and leakage classes specified in "Duct Schedule" Article according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."

B. Seal ducts to the following seal classes according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible":

1. Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible."

2. Outdoor, Supply-Air Ducts: Seal Class A. 3. Outdoor, Exhaust Ducts: Seal Class C. 4. Outdoor, Return-Air Ducts: Seal Class C. 5. Unconditioned Space, Supply-Air Ducts in Pressure Classes 2-Inch wg

and Lower: Seal Class B. 6. Unconditioned Space, Supply-Air Ducts in Pressure Classes Higher Than

2-Inch wg: Seal Class A. 7. Unconditioned Space, Exhaust Ducts: Seal Class C. 8. Unconditioned Space, Return-Air Ducts: Seal Class B. 9. Conditioned Space, Supply-Air Ducts in Pressure Classes 2-Inch wg and

Lower: Seal Class C. 10. Conditioned Space, Supply-Air Ducts in Pressure Classes Higher Than 2-

Inch wg: Seal Class B. 11. Conditioned Space, Exhaust Ducts: Seal Class B. 12. Conditioned Space, Return-Air Ducts: Seal Class C.



A. Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Chapter 5, "Hangers and Supports."

B. Building Attachments: Concrete inserts, powder-actuated fasteners, or structural-steel fasteners appropriate for construction materials to which hangers are being attached.

1. Where practical, install concrete inserts before placing concrete. 2. Install powder-actuated concrete fasteners after concrete is placed and

completely cured. 3. Use powder-actuated concrete fasteners for standard-weight aggregate

concretes or for slabs more than 4 inches thick. 4. Do not use powder-actuated concrete fasteners for lightweight-aggregate

concretes or for slabs less than 4 inches thick. 5. Do not use powder-actuated concrete fasteners for seismic restraints.

C. Hanger Spacing: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible," Table 5-1, "Rectangular Duct Hangers Minimum Size," and Table 5-2, "Minimum Hanger Sizes for Round Duct," for maximum hanger spacing; install hangers and supports within 24 inches of each elbow and within 48 inches of each branch intersection.

D. Hangers Exposed to View: Threaded rod and angle or channel supports.

E. Support vertical ducts with steel angles or channel secured to the sides of the duct with welds, bolts, sheet metal screws, or blind rivets; support at each floor and at a maximum intervals of 16 feet.

F. Install upper attachments to structures. Select and size upper attachments with pull-out, tension, and shear capacities appropriate for supported loads and building materials where used.

3.4 CONNECTIONS

A. Make connections to equipment with flexible connectors complying with Division 23 Section "Air Duct Accessories."

B. Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" for branch, outlet and inlet, and terminal unit connections.


AIR DUCT ACCESSORIES 233300 - 1 East Fairmont Middle School

SECTION 233300 - AIR DUCT ACCESSORIES

PART 1 - GENERAL

1.1 SUMMARY


1. Backdraft and pressure relief dampers. 2. Manual volume dampers. 3. Control dampers. 4. Fire dampers. 5. Turning vanes. 6. Duct-mounted access doors. 7. Flexible connectors. 8. Flexible ducts. 9. Duct accessory hardware.

1.2 SUBMITTALS


B. Shop Drawings: For duct accessories. Include plans, elevations, sections, details and attachments to other work.

1. Detail duct accessories fabrication and installation in ducts and other construction. Include dimensions, weights, loads, and required clearances; and method of field assembly into duct systems and other construction. Include the following:

a. Special fittings. b. Manual volume damper installations. c. Control damper installations. d. Fire-damper and smoke-damper installations, including sleeves; and

duct-mounted access doors. e. Wiring Diagrams: For power, signal, and control wiring.

C. Operation and maintenance data.


A. Comply with NFPA 90A, "Installation of Air Conditioning and Ventilating Systems”.


B. Comply with AMCA 500-D testing for damper rating.

PART 2 - PRODUCTS

2.1 MATERIALS

A. Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" for acceptable materials, material thicknesses, and duct construction methods unless otherwise indicated. Sheet metal materials shall be free of pitting, seam marks, roller marks, stains, discolorations, and other imperfections.

B. Galvanized Sheet Steel: Comply with ASTM A 653/A 653M.

1. Galvanized Coating Designation: G60. 2. Exposed-Surface Finish: Mill phosphatized.

C. Stainless-Steel Sheets: Comply with ASTM A 480/A 480M, Type 304, and having a No. 2 finish.

D. Aluminum Sheets: Comply with ASTM B 209, Alloy 3003, Temper H14; with mill finish for concealed ducts and standard, 1-side bright finish for exposed ducts.

E. Extruded Aluminum: Comply with ASTM B 221, Alloy 6063, Temper T6.

F. Reinforcement Shapes and Plates: Galvanized-steel reinforcement where installed on galvanized sheet metal ducts; compatible materials for aluminum and stainless-steel ducts.

G. Tie Rods: Galvanized steel, 1/4-inch minimum diameter for lengths 36 inches or less; 3/8-inch minimum diameter for lengths longer than 36 inches.

2.2 BACKDRAFT AND PRESSURE RELIEF DAMPERS

A. Description: Gravity balanced.

B. Maximum Air Velocity: 2000 fpm.

C. Maximum System Pressure: 1-inch wg.

D. Blade Action: Parallel.

E. Blade Seals: Vinyl foam.

F. Return Spring: Adjustable tension.


G. Accessories:

1. Adjustment device to permit setting for varying differential static pressure. 2. Counterweights and spring-assist kits for vertical airflow installations.

2.3 MANUAL VOLUME DAMPERS

A. Standard, Steel, Manual Volume Dampers:

1. Standard leakage rating with linkage outside airstream. 2. Suitable for horizontal or vertical applications.

B. Damper Hardware:

1. Zinc-plated, die-cast core with dial and handle made of 3/32-inch- thick zinc-plated steel, and a 3/4-inch hexagon locking nut.

2. Include center hole to suit damper operating-rod size. 3. Include elevated platform for insulated duct mounting.

2.4 CONTROL DAMPERS

A. Blades:

1. Multiple blade with maximum blade width of 8 inches. 2. Parallel- and opposed-blade design. 3. Galvanizedsteel. 4. Blade Edging: Closed-cell neoprene edging.

B. Bearings: 1. Dampers in ducts with pressure classes of 3-inch wg or less shall have

axles full length of damper blades and bearings at both ends of operating shaft.

2. Thrust bearings at each end of every blade.

2.5 FIRE DAMPERS

A. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include the following (or equal):

1. Air Balance Inc.; a division of Mestek, Inc. 2. Arrow United Industries; a division of Mestek, Inc. 3. Greenheck Fan Corporation. 4. McGill AirFlow LLC. 5. METALAIRE, Inc.


6. Nailor Industries Inc. 7. Prefco; Perfect Air Control, Inc. 8. Ruskin Company. 9. Ward Industries, Inc.; a division of Hart & Cooley, Inc.

B. Type: Dynamic; rated and labeled according to UL 555 by an NRTL.

C. Closing rating in ducts up to 4-inch wg static pressure class and minimum 4000-fpm velocity.

D. Fire Rating: 1-1/2 hours.

E. Frame: Curtain type with blades outside airstream fabricated with roll-formed, 0.034-inch- thick galvanized steel; with mitered and interlocking corners.

F. Mounting Sleeve: Factory- or field-installed, galvanized sheet steel.

1. Minimum Thickness: 0.052 or 0.138 inch thick, as indicated, and of length to suit application.

2. Exception: Omit sleeve where damper-frame width permits direct attachment of perimeter mounting angles on each side of wall or floor; thickness of damper frame must comply with sleeve requirements.

G. Mounting Orientation: Vertical or horizontal as indicated.

H. Blades: Roll-formed, interlocking, 0.034-inch- thick, galvanized sheet steel. In place of interlocking blades, use full-length, 0.034-inch- thick, galvanized-steel blade connectors.

I. Horizontal Dampers: Include blade lock and stainless-steel closure spring.

J. Heat-Responsive Device: Replaceable, 165 deg F rated, fusible links.

2.6 TURNING VANES

A. Manufactured Turning Vanes for Metal Ducts: Curved blades of galvanized sheet steel; support with bars perpendicular to blades set; set into vane runners suitable for duct mounting.

B. General Requirements: Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible"; Figures 4-3, "Vanes and Vane Runners," and 4-4, "Vane Support in Elbows."

C. Vane Construction: Single wall.


2.7 DUCT-MOUNTED ACCESS DOORS

A. Duct-Mounted Access Doors: Fabricate access panels according to SMACNA's "HVAC Duct Construction Standards - Metal and Flexible"; Figures 7-2, "Duct Access Doors and Panels," and 7-3, "Access Doors - Round Duct."

1. Door:

a. Double wall, rectangular. b. Galvanized sheet metal with insulation fill and thickness as indicated

for duct pressure class. c. Vision panel. d. Hinges and Latches: 1-by-1-inch butt or piano hinge and cam

latches. e. Fabricate doors airtight and suitable for duct pressure class.

2. Frame: Galvanized sheet steel, with bend-over tabs and foam gaskets. 3. Number of Hinges and Locks:

a. Access Doors Less Than 12 Inches Square: No hinges and two sash locks.

b. Access Doors up to 18 Inches Square: Two hinges and two sash locks.

2.8 FLEXIBLE CONNECTORS

A. Materials: Flame-retardant or noncombustible fabrics.

B. Coatings and Adhesives: Comply with UL 181, Class 1.

C. Metal-Edged Connectors: Factory fabricated with a fabric strip [3-1/2 inches] [5-3/4 inches] wide attached to 2 strips of 2-3/4-inch- wide, 0.028-inch- thick, galvanized sheet steel or 0.032-inch- thick aluminum sheets. Provide metal compatible with connected ducts.

D. Indoor System, Flexible Connector Fabric: Glass fabric double coated with neoprene.

1. Minimum Weight: 26 oz./sq. yd.. 2. Tensile Strength: 480 lbf/inch in the warp and 360 lbf/inch in the filling. 3. Service Temperature: Minus 40 to plus 200 deg F.


2.9 FLEXIBLE DUCTS

A. Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include the following (or equal):

1. Flexmaster U.S.A., Inc. 2. McGill AirFlow LLC. 3. Ward Industries, Inc.; a division of Hart & Cooley, Inc.

B. Noninsulated, Flexible Duct: UL 181, Class 1, 2-ply vinyl film supported by helically wound, spring-steel wire.

1. Pressure Rating: 10-inch wg positive and 1.0-inch wg negative. 2. Maximum Air Velocity: 4000 fpm. 3. Temperature Range: Minus 10 to plus 160 deg F.

C. Insulated, Flexible Duct: UL 181, Class 1, 2-ply vinyl film supported by helically wound, spring-steel wire; fibrous-glass insulation; [polyethylene] [aluminized] vapor-barrier film.

1. Pressure Rating: 10-inch wg positive and 1.0-inch wg negative. 2. Maximum Air Velocity: 4000 fpm. 3. Temperature Range: Minus 10 to plus 160 deg F. 4. Insulation R-value: Comply with ASHRAE/IESNA 90.1.

2.10 DUCT ACCESSORY HARDWARE

A. Instrument Test Holes: Cast iron or cast aluminum to suit duct material, including screw cap and gasket. Size to allow insertion of pitot tube and other testing instruments and of length to suit duct-insulation thickness.

B. Adhesives: High strength, quick setting, neoprene based, waterproof, and resistant to gasoline and grease.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install duct accessories according to applicable details in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible" for metal.

B. Install duct accessories of materials suited to duct materials; use galvanized-steel accessories in galvanized-steel, stainless-steel accessories in stainless-steel ducts, and aluminum accessories in aluminum ducts.


C. Install volume dampers at points on supply, return, and exhaust systems where branches extend from larger ducts. Where dampers are installed in ducts having duct liner, install dampers with hat channels of same depth as liner, and terminate liner with nosing at hat channel.

1. Install steel volume dampers in steel ducts. 2. Install aluminum volume dampers in aluminum ducts.

D. Set dampers to fully open position before testing, adjusting, and balancing.

E. Install test holes at fan inlets and outlets and elsewhere as indicated.

F. Install fire dampers according to UL listing.

G. Install duct access doors on sides of ducts to allow for inspecting, adjusting, and maintaining accessories and equipment at the following locations:

1. On both sides of duct coils. 2. At outdoor-air intakes and mixed-air plenums. 3. At drain pans and seals. 4. Downstream from manual volume dampers, control dampers, backdraft

dampers, and equipment. 5. Adjacent to and close enough to fire or smoke dampers, to reset or

reinstall fusible links. Access doors for access to fire or smoke dampers having fusible links shall be pressure relief access doors; and shall be outward operation for access doors installed upstream from dampers and inward operation for access doors installed downstream from dampers.

6. At each change in direction and at maximum 50-foot spacing. 7. Control devices requiring inspection. 8. Elsewhere as indicated.

H. Install access doors with swing against duct static pressure.

I. Access Door Sizes:

1. One-Hand or Inspection Access: 8 by 5 inches. 2. Two-Hand Access: 12 by 6 inches. 3. Head and Hand Access: 18 by 10 inches.

J. Label access doors according to Division 23 Section "Identification for HVAC Piping and Equipment" to indicate the purpose of access door.

K. Install flexible connectors to connect ducts to equipment.

L. Install turning vanes at each rectangular elbow,

M. Connect diffusers or light troffer boots to ducts with maximum 60-inch length of flexible duct clamped or strapped in place.


N. Install duct test holes where required for testing and balancing purposes.


A. Tests and Inspections:

1. Operate dampers to verify full range of movement. 2. Inspect locations of access doors and verify that purpose of access door

can be performed. 3. Operate fire and smoke dampers to verify full range of movement and

verify that proper heat-response device is installed. 4. Inspect turning vanes for proper and secure installation.

3.3 DEMONSTRATION



POWER VENTILATORS 233423-1 East Fairmont Middle School

SECTION 233423 - POWER VENTILATORS

PART 1 - GENERAL

1.1 SUMMARY

A. This Section includes the following:

1. Centrifugal roof exhausters.


A. Project Altitude: Base air ratings on sea-level conditions.

B. Operating Limits: Classify according to AMCA 99.

1.3 SUBMITTALS

A. Product Data: Include rated capacities, furnished specialties, and accessories for each type of product indicated and include the following:

1. Certified fan performance curves with system operating conditions indicated. Submit CFM vs. ESP tables from published catalog.

2. Certified fan sound-power ratings. 3. Motor ratings and electrical characteristics, plus motor and electrical

accessories. 4. Material gages and finishes, including color charts. 5. Dampers, including housings, linkages, and operators.

B. Shop Drawings: Detail equipment assemblies and indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.

1. Wiring Diagrams: Power, signal, and control wiring. Differentiate between manufacturer-installed and field-installed wiring.

C. Maintenance Data: For power ventilators to include in maintenance manuals specified in Division 1.




B. AMCA Compliance: Products shall comply with performance requirements and shall be licensed to use the AMCA-Certified Ratings Seal.

C. NEMA Compliance: Motors and electrical accessories shall comply with NEMA standards.

D. UL Standard: Power ventilators shall comply with UL 705.

1.5 DELIVERY, STORAGE, AND HANDLING

A. Deliver fans as factory-assembled unit, to the extent allowable by shipping limitations, with protective crating and covering.

B. Disassemble and reassemble units, as required for moving to final location, according to manufacturer's written instructions.

C. Lift and support units with manufacturer's designated lifting or supporting points.

1.6 COORDINATION

A. Coordinate size and location of structural-steel support members.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

1. Power Ventilators:

a. Ammerman Company, Inc./General Resource Corp. b. Cook, Loren Company. c. Dayton Electric Manufacturing Co. d. Greenheck Fan Corp. e. ILG Industries, Inc./American Coolair Corp. f. Penn Ventilation Companies, Inc. g. Approved equal.

2.2 CENTRIFUGAL ROOF VENTILATORS


A. Description: Belt-driven or direct-driven centrifugal fans consisting of housing, wheel, fan shaft, bearings, motor and disconnect switch, drive assembly, curb base, and accessories.

B. Housing: Removable, spun-aluminum, dome top and outlet baffle; square, one-piece, aluminum base with venturi inlet cone.

C. Fan Wheels: Aluminum hub and wheel with backward-inclined blades.

D. Belt-Driven Drive Assembly: Resiliently mounted to housing, with the following features:

1. Fan Shaft: Turned, ground, and polished steel; keyed to wheel hub. 2. Shaft Bearings: Permanently lubricated, permanently sealed, self-aligning

ball bearings. 3. Pulleys: Cast-iron, adjustable-pitch motor pulley. 4. Fan and motor isolated from exhaust airstream.

E. Accessories:

1. Variable-Speed Controller: Solid-state control to reduce speed from 100 percent to less than 50 percent.

2. Disconnect Switch: Nonfusible type, with thermal-overload protection mounted inside fan housing, factory wired through an internal aluminum conduit.

3. Bird Screens: Removable, 1/2-inch (13-mm) mesh, aluminum or brass wire.

4. Dampers: Counterbalanced, parallel-blade, backdraft dampers mounted in curb base; factory set to close when fan stops.

F. Roof Curbs: Galvanized steel; mitered and welded corners; 1-1/2-inch- (40-mm-) thick, rigid, fiberglass insulation adhered to inside walls; and 1-1/2-inch (40-mm) wood nailer. Size as required to suit roof opening and fan base.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install power ventilators level and plumb.

B. Install units with clearances for service and maintenance.

C. Label units according to requirements specified in Division 15 Section "Mechanical Identification."


3.2 CONNECTIONS

A. Duct installation and connection requirements are specified in other Division 15 Sections. Drawings indicate general arrangement of ducts and duct accessories. Make final duct connections with flexible connectors. Flexible connectors are specified in Division 23 Section "Duct Accessories."

B. Install ducts adjacent to power ventilators to allow service and maintenance.

C. Ground equipment.

D. Tighten electrical connectors and terminals according to manufacturer's published torque-tightening values. If manufacturer's torque values are not indicated, use those specified in UL 486A and UL 486B.


A. Equipment Startup Checks:

1. Verify that shipping, blocking, and bracing are removed. 2. Verify that unit is secure on mountings and supporting devices and that

connections to ducts and electrical components are complete. Verify that proper thermal-overload protection is installed in motors, starters, and disconnect switches.

3. Verify that cleaning and adjusting are complete. 4. Disconnect fan drive from motor, verify proper motor rotation direction,

and verify fan wheel free rotation and smooth bearing operation. Reconnect fan drive system, align and adjust belts, and install belt guards.

5. Verify lubrication for bearings and other moving parts. 6. Verify that manual and automatic volume control and fire and smoke

dampers in connected ductwork systems are in fully open position.

B. Starting Procedures:

1. Energize motor and adjust fan to indicated rpm. 2. Measure and record motor voltage and amperage.

C. Operational Test: After electrical circuitry has been energized, start units to confirm proper motor rotation and unit operation. Remove malfunctioning units, replace with new units, and retest.

D. Refer to Division 23 Section "Testing, Adjusting, and Balancing" for testing, adjusting, and balancing procedures.

E. Repair or replace malfunctioning units. Retest as specified above after repairs or replacements are made.


3.4 ADJUSTING

A. Adjust damper linkages for proper damper operation.

B. Lubricate bearings.

3.5 CLEANING

A. On completion of installation, internally clean fans according to manufacturer's written instructions. Remove foreign material and construction debris. Vacuum fan wheel and cabinet.

B. After completing system installation, including outlet fitting and devices, inspect exposed finish. Remove burrs, dirt, and construction debris and repair damaged finishes.

3.6 DEMONSTRATION



DIFFUSERS, REGISTERS, AND GRILLES 233713 - 1 East Fairmont Middle School

SECTION 233713 - DIFFUSERS, REGISTERS, AND GRILLES

PART 1 - GENERAL

1.1 SUMMARY


1. Louver face ceiling diffusers. 2. Registers and grilles

B. Related Sections:

1. Division 23 Section "Air Duct Accessories" for fire and smoke dampers and volume-control dampers not integral to diffusers, registers, and grilles.

1.2 SUBMITTALS

A. Product Data: For each type of product indicated, include the following:

1. Data Sheet: Indicate materials of construction, finish, and mounting details; and performance data including throw and drop, static-pressure drop, and noise ratings.

PART 2 - PRODUCTS

2.1 CEILING DIFFUSERS

A. Ceiling Diffuser


a. Anemostat Products; a Mestek company. b. Carnes. c. Hart & Cooley Inc. d. METALAIRE, Inc. e. Nailor Industries Inc. f. Price Industries. g. Titus. h. Tuttle & Bailey.


2. Material: Steel. 3. Finish: Baked enamel, white 4. Mounting: Duct connection.

2.2 REGISTERS AND GRILLES

A. Fixed Face Register


a. Anemostat Products; a Mestek company. b. Carnes. c. Hart & Cooley Inc. d. Krueger. e. Nailor Industries Inc. f. Price Industries. g. Titus. h. Tuttle & Bailey.

2. Material: Steel. 3. Finish: Baked enamel, white. 4. Face Arrangement: bar grille. 5. Frame: 1-1/2 inches wide. 6. Mounting: Countersunk screw

2.3 SOURCE QUALITY CONTROL

A. Verification of Performance: Rate diffusers, registers, and grilles according to ASHRAE 70, "Method of Testing for Rating the Performance of Air Outlets and Inlets."

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install diffusers, registers, and grilles level and plumb.

B. Ceiling-Mounted Outlets and Inlets: Drawings indicate general arrangement of ducts, fittings, and accessories. Air outlet and inlet locations have been indicated to achieve design requirements for air volume, noise criteria, airflow pattern, throw, and pressure drop. Make final locations where indicated, as much as practical. For units installed in lay-in ceiling panels, locate units in the


center of panel. Where architectural features or other items conflict with installation, notify Architect for a determination of final location.

C. Install diffusers, registers, and grilles with airtight connections to ducts and to allow service and maintenance of dampers, air extractors, and fire dampers.

3.2 ADJUSTING

A. After installation, adjust diffusers, registers, and grilles to air patterns indicated, or as directed, before starting air balancing.


COMMERCIAL KITCHEN HOODS 233813 - 1

EAST FAIRMONT MIDDLE SCHOOL

SECTION 233813 - COMMERCIAL KITCHEN HOODS

PART 1 - GENERAL



1.2 SUMMARY

A. This Section includes Type I and Type 2 commercial kitchen hoods, and associated equipment.


1. Division 15 Section "Power Ventilators" for exhaust fans. 2. Division 13 Section "Temperature Control System" for automatic controls

for exhaust fans, and fire alarm systems.

1.3 DEFINITIONS

A. Listed Hood: A hood tested according to UL 710 by a testing agency acceptable to authorities having jurisdiction.

B. Type I Hood: A hood designed for grease exhaust applications.

C. Type 2 Hood: A hood designed to exhaust heat and vapor only.

1.4 SUBMITTALS

A. Product Data: For the following:

1. Hoods. 2. Grease removal devices. 3. Fire-suppression systems. 4. Lighting fixtures.

B. Shop Drawings:

1. Show plan view, elevation view, sections, roughing-in dimensions, service requirements, duct connection sizes, and attachments to other work.



2. Show cooking equipment plan and elevation to confirm minimum code-required overhang.

3. Indicate performance, exhaust and makeup air airflow and pressure loss, at actual Project-site elevation.

4. Indicate method of attaching hangers to building structure. 5. Show control cabinets. 6. Show fire-protection piping, actuation devices, and manual control

devices. 7. Detail equipment assemblies and indicate dimensions, weights, loads,

required clearances, method of field assembly, components, and location and size of each field connection.

8. Wiring Diagrams: Power, signal, and control wiring.

C. Piping Diagrams: Detail fire-suppression piping and components and differentiate between manufacturer-installed and field-installed piping. Include roughing-in requirements for drain connections. Show cooking equipment plan and elevation to illustrate fire-suppression nozzle locations.

D. Field test reports.


A. Welding: Qualify procedures and personnel according to AWS D1.1, "Structural Welding Code--Steel," for hangers and supports; and AWS D9.1, "Sheet Metal Welding Code," for joint and seam welding.

B. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

C. NSF Compliance: Fabricate hoods according to NSF 2, "Food Equipment."

D. SMACNA Compliance:

1. Fabricate hoods to comply with SMACNA's "HVAC Duct Construction Standards: Metal and Flexible," second edition.

1.6 PROJECT CONDITIONS

A. Field Measurements: Verify dimensions of food service equipment installation areas by field measurements before fabrication and indicate measurements on Shop Drawings.



1. Established Dimensions: Where field measurements cannot be made without delaying the Work, establish required dimensions using approved food facility equipment Shop Drawings. Coordinate fabrication with food facility equipment manufacturer to ensure that actual dimensions correspond to established dimensions.

1.7 COORDINATION

A. Coordinate equipment layout and installation with other Work, including light fixtures, HVAC equipment, and fire-suppression system components.

PART 2 - PRODUCTS

2.1 MANUFACTURERS


1. Commercial Kitchen Hoods:

a. Aerolator Systems, Inc. b. AyrKing Corporation. c. Captive-Aire Systems. d. Duo-Aire, Inc. e. Gaylord Industries, Inc. f. Grease Master; Div. of Custom Industries Inc. g. Greenheck. h. Halton Company. i. Sturdi-Bilt Restaurant Equipment Company. j. Vent Master; Div. of Garland Commercial Ranges, LTD.

2. Wet-Chemical Fire-Suppression Systems:

a. Ansul Incorporated; a Tyco International Ltd. Company. b. Badger Fire Protection, Inc. c. Fenwall Safety Systems, Inc.; Div. of Kidde Technologies, Inc. d. Pyro Chem, Inc.

2.2 HOOD MATERIALS

A. Stainless-Steel Sheet: ASTM A 666, Type 304.

1. Minimum Thickness: 0.03 inch (0.8 mm).



2. General: Comply with SSINA's "Finishes for Stainless Steel" for recommendations for applying and designating finishes.

3. Remove tool and die marks and stretch lines or blend into finish. Grind and polish surfaces to produce uniform, directionally textured, polished finish indicated, free of cross scratches. Run grain with long dimension of each piece.

4. Concealed Stainless-Steel Surfaces: ASTM A 480/A 480M, No. 2B finish (bright, cold-rolled, unpolished finish).

5. Exposed Surfaces: ASTM A 480/A 480M, No. 3 finish (intermediate polished surface).

6. When polishing is completed, passivate and rinse surfaces. Remove embedded foreign matter and leave surfaces chemically clean.

B. Sealant: ASTM C 920; Type S, Grade NS, Class 25, Use NT. Elastomeric sealant shall be NSF certified for commercial kitchen hood application. Sealants, when cured and washed, shall comply with requirements in 21 CFR, Section 177.2600, for use in areas that come in contact with food.

1. Color: As selected by Architect from manufacturer's full range. 2. Backer Rod: Closed-cell polyethylene, in diameter larger than joint width.

C. Gaskets: NSF certified for end-use application indicated; of resilient rubber, neoprene, or PVC that is nontoxic, stable, odorless, nonabsorbent, and unaffected by exposure to foods and cleaning compounds, and passes testing according to UL 710.

2.3 TYPE I EXHAUST HOOD FABRICATION

A. Weld all joints exposed to grease with continuous external welds and make grease removal devices and makeup air diffusers easily accessible for cleaning.

1. Hood(s) shall be listed and labeled, according to UL 710, by a testing agency acceptable to authorities having jurisdiction.

2. Include access panels as required for cleaning. 3. Exhaust-Duct Collars: Minimum 0.0625-inch- (1.58-mm-) thick stainless

steel at least 3 inches (75 mm) long, continuously welded to top of hood and at corners.

B. Hood Configuration: Exhaust only.

C. Hood Style: Wall-mounted canopy.

D. Grease Removal Devices: Removable, stainless-steel, filter/baffle grease filters. Fabricate with minimum 0.0781-inch- (1.98-mm-) thick stainless steel for filter frame and removable collection cup and trough. Exposed surfaces shall



be pitched to drain to collection cup. Filters/baffles shall comply with UL 1046, "Grease Filters for Exhaust Ducts."

E. Light Fixtures: UL-listed, surface-mounted, incandescent fixtures and lamps with lenses sealed vaportight. Wiring shall be installed in stainless-steel conduit on hood exterior. Number and location of fixtures shall provide a minimum of 70 fc (753 lx) on cooking surface below hood.

1. Switches shall be mounted onto hood. 2. Incandescent Lighting Fixtures: Comply with UL 1571.

F. Wet-Chemical Fire-Suppression System: Preengineered distribution piping designed for automatic detection and release or manual release of fire-suppression agent by hood operator. Fire-suppression system shall be listed and labeled by a testing agency acceptable to authorities having jurisdiction.

1. Steel Pipe, NPS 2 (DN 50) and Smaller: ASTM A 53/A 53M, Type S, Grade A, Schedule 40, plain ends.

2. Malleable-Iron Threaded Fittings: ASME B16.3, Classes 150 and 300. 3. Pipe Covers: Chrome-plated aluminum tubing. 4. Piping, fusible links and release mechanism, tank containing the

suppression agent, and controls shall be factory installed. Controls shall be in stainless-steel control cabinet mounted on wall. Furnish manual pull station for wall mounting adjacent to hood. Exposed piping shall be covered with stainless-steel sleeves. Exposed fittings shall be chrome plated.

5. Liquid Extinguishing Agent: Noncorrosive, low-pH liquid. 6. Furnish an electric-operated, gas shutoff valve with clearly marked open

and closed indicator for field installation. 7. Fire-suppression system controls shall be integrated with controls for fans,

lights, and fuel supply and located in a single cabinet for each group of hoods immediately adjacent.

8. Wiring shall have color-coded, numbered terminal blocks and grounding bar. Spare terminals for fire alarm, optional wiring to start fan with fire alarm, red pilot light to indicate fan operation, and control switches shall all be factory wired in control cabinet with relays or starters.

G. Hood Controls: Single, wall-mounting control cabinet shall be fabricated of stainless steel.

1. Exhaust Fan: On-off switches shall start and stop the exhaust fan. Interlock exhaust fan with fire-suppression system to operate fan during fire-suppression-agent release and to remain in operation until manually



stopped. Provide fan starter in control cabinet. Interlock with rooftop unit outside air dampers.

H. Front Supply Plenum: Stainless steel with perforated diffuser.

I. Fabricate hoods with stainless steel.

2.4 TYPE 2 EXHAUST HOOD FABRICATION

A. SMACNA Compliance: Fabricate hoods to comply with SMACNA's "HVAC Duct Construction Standards: Metal and Flexible," second edition.

B. Fabricate hoods with stainless steel.

C. Hood Configuration: Exhaust only

D. Hood Type: Heat, vapor and condensate removal.

E. Hood Style: Wall-mounted canopy

F. Condensate Hood Baffles: Removable stainless-steel baffles to drain into a hood drain trough, and stainless-steel drain piping.

PART 3 - EXECUTION

3.1 EXAMINATION

A. Examine substrates and conditions, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting installation.

B. Examine roughing-in for piping systems to verify actual locations of piping connections before equipment installation.

C. Proceed with installation only after unsatisfactory conditions have been corrected.

3.2 INSTALLATION

A. Install hoods level and plumb.

B. Complete field assembly of hoods where required.

1. Make closed butt and contact joints that do not require filler.



2. Grind field welds on stainless-steel equipment smooth, and polish to match adjacent finish. Comply with welding requirements in Part 2 "General Hood Fabrication" Article.

C. Install hoods and associated services with clearances and access for maintaining, cleaning, and servicing hoods, grease removal devices, and fire-suppression systems according to manufacturer's written instructions and requirements of authorities having jurisdiction.

D. Make cutouts in hoods where required to run service lines and to make final connections.

E. Securely anchor and attach items and accessories to walls, floors, or bases with stainless-steel fasteners, unless otherwise indicated.

F. Install hoods to operate free from vibration.

G. Install trim strips and similar items requiring fasteners in a bed of sealant. Fasten with stainless-steel fasteners at 48 inches (1200 mm) o.c. maximum.

H. Install sealant in joints between equipment and abutting surfaces with continuous joint backing, unless otherwise indicated. Provide airtight, watertight, vermin-proof, sanitary joints.

I. Install lamps, with maximum recommended wattage, in equipment with integral lighting.

3.3 CONNECTIONS

A. Piping installation requirements are specified in other Division 15 Sections. Drawings indicate general arrangement of piping, fittings, and specialties.

B. Install piping adjacent to machine with clearance to allow service and maintenance.

C. Duct Connections: Comply with applicable requirements in Division 15 Section "Duct Accessories" for flexible connectors on makeup air supply duct. Weld exhaust-duct connections.

D. Fire-Suppression Piping: Install piping connections for remote-mounted suppression systems according to NFPA 17, "Wet Chemical Extinguishing Systems."

E. Ground equipment.



F. Tighten electrical connectors and terminals according to manufacturer's published torque-tightening values. If manufacturer's torque values are not indicated, use those specified in UL 486A and UL 486B.

3.4 DEMONSTRATION


3.5 CLEANING

A. Remove protective coverings and clean and sanitize hoods and associated services, both inside and out, according to manufacturer's written instructions.

B. Remove paint splatters and other spots, dirt, and debris. Repair damaged finish to match original finish.


AIR-TO-AIR ENERGY RECOVERY UNITS 237200 - 1


SECTION 237200 - AIR-TO-AIR ENERGY RECOVERY UNITS

PART 1 - GENERAL



1.2 SUMMARY

A. This Section includes the following:

1. Packaged total energy recovery units consisting of direct expansion refrigeration system with cooling coil and integrated condensing package, dessicant wheel, enthalpy wheel, filtration systems and supply and exhaust fans.

2. Interface with DDC control system.


1. Division 23 Section "HVAC Instrumentation and Controls" for control wiring and control devices connected to energy recovery units.

1.3 SUBMITTALS

A. Product Data: Include rated capacities, furnished specialties, and accessories.

B. Shop Drawings:

1. Include plans, elevations, sections, details, and attachments to other Work.

2. Wiring Diagrams: Power, signal, and control wiring.

C. Field quality-control test reports.


A. Source Limitations: Obtain air-to-air energy recovery units through one source from a single manufacturer.



B. Product Options: Drawings indicate size, profiles, and dimensional requirements of air-to-air energy recovery units and are based on the specific system indicated. Refer to Division 1 Section "Product Requirements."

C. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

D. ASHRAE Compliance: Capacity ratings for energy recovery devices shall comply with ASHRAE 84, "Method of Testing Air-to-Air Heat Exchangers."

E. NRCA Compliance: Roof curbs for roof-mounted equipment shall be constructed according to recommendations of NRCA.

1.5 COORDINATION

A. Coordinate size and location of roof framing.

1.6 EXTRA MATERIALS

A. Furnish extra materials described below that match products installed and that are packaged with protective covering for storage and identified with labels describing contents.

1. Filters: Furnish one set of each type of filter specified. 2. Fan Belts: Furnish one of belts for each belt-driven fan in energy recovery

units. 3. Wheel Belts: Furnish one sets of belts for each heat wheel.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. In other Part 2 articles where subparagraph titles below introduce lists, the following requirements apply for product selection:

1. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated into the Work include, but are not limited to, the manufacturers specified.

2.2 PACKAGED ENERGY RECOVERY UNITS

A. Available Manufacturers:



1. AAON 2. Carrier 3. Cook Ventilator 4. Greenheck. 5. Munters 6. SEMCO Incorporated. 7. Trane Company (The); Worldwide Applied Systems Group. 8. Approved equal.

2.3 PACKAGED ENERGY RECOVERY UNITS

A. Cabinet: Weather resistant, minimum 18 ga. galvanized steel, bolted to mini-mum 16 gauge galvanized steel base with integral lifting lugs. Interior panels shall be insulated with 1” thick 3 pcf foil faced fiberglass insulation. Unit shall have slide track for energy wheel. Removable side panels with quarter turn latches shall be provided for access to components. Intake shall have motor-ized damper. Exhaust shall have backdraft damper.

B. The desiccant wheel media shall be a monolithic, extended-surface contact

medium, fabricated entirely of inert, inorganic binders and glass fibers formed into narrow passages in the direction of airflow. The wheel shall be non-toxic. The process and reactivation air streams shall be separated by air seals and in-ternal partitions so that the humid reactivation air does not mix with the dry pro-cess air. .

C. Supply blowers are belt-drive forward curve or belt-drive backward inclined air

foil blade type. Condenser fans shall be direct driven propeller type. Reactiva-tion fans shall be direct-driven backward inclined air foil blade type with VFD control. Direct-drive blower fan speed shall not exceed 80% of the fan shaft critical speed. Access shall be provided to the supply and reactivation blower for inspection and servicing. All fans shall be rated in accordance with AMCA Standard 210. Blower and motor assemblies shall be mounted on rubber vibra-tion isolators.

D. All internal electrical components shall be prewired for single point electrical

connection. Internal control panel shall be UL listed with hinged access door and interlocking NEMA 3R disconnect switch. Each motor shall have a combi-nation starter with nonfused disconnect, overcurrent, overload and motor start-ing functions. A 24 volt control circuit shall be provided to allow remote on/off control by external DDC system. Short circuit protection shall be provided on primary and secondary of control circuit transformer.

E. The unit shall include disposable filters with 25% to 30% minimum efficiency with 90% to 92% arrestance minimum as rated by ASHRAE Test Standard 52-76. The filters shall be removable at the inlet of both supply and reactivation air streams. These filters shall be mounted on sliding or lift racks and accessible



through access or doors. The entire supply and reactivation air stream shall be filtered. Filters shall be 2” thick fiberglass disposable type, pleated. Filters shall have minimum efficiency of 25% Ashrae dust spot (MERV 11), tested in accordance with ASHRAE Test Standard 52.1 and 52.2.

F. Electric preheat coil shall be provided to prevent frosting of wheel at low ambient temperatures. Coil shall be UL listed with multiple stage control, air flow proving switch, 24 volt control circuit.

G. INDIRECT GAS FIRED HEATING SYSTEM

1. Provide indirect gas-fired heating system on discharge air to heat discharge air to setpoint of discharge air thermostat.

2. Heater shall conform to ANSI Z83.8. Unit shall be suitable for operation on natural gas or propane as specified. Unit shall be of down blast or horizontal configuration. Unit shall have an input rating of 100, 150, 200, 250, 300 or 400 MBH on high firing rate and 55, 80, 110, 135,160, or 220 MBH on low firing rate, respectively, or shall be 4:1 turndown modulating output. Where input is greater than 400 MBH multiple heaters shall be used. It shall contain tube type heated exchangers, flue gas collector with vent fan, in shot burners, and controls for high and low fire. Unit shall be un-housed and fit within the unit housing envelope dimensions.

3. Burners shall be die formed in-shot type. Burners shall be individually removable for cleaning or service. Entire burner assembly shall be easily removable as an assembly. Unit shall have a powered venting system consisting of a collection box, direct drive vent fan and an air proving switch. The collection box shall be made of the same material as the heat exchanger bulkhead plate and shall be removable. The venting fan bearings shall have a minimum L10 bearing life of 24000 hrs. The vent fan shall exhaust the flue gas horizontally out the side of the unit. The unit fan shall operate on 120/1/60 and not exceed 2 FLA.

4. Tubes shall be permanently attached to a bulkhead plate to form an airtight seal between combustion byproducts and heated air system. Heat exchanger shall be constructed of 18 gauge aluminized tubes with 14 gauge aluminized steel bulkhead plate. Heat exchanger shall be rated for a minimum lifespan of 100,000 cycles.

5. Gas train shall utilize components certified by AGA. Gas train shall consist of a 24 VAC two stage combination valve (manual on-off, automatic safety shutoff, regulation to handle 0.5 psig input pressure and adjustable pilot valve). The combination valve shall be rated at a flow of 400 MBH. The valve shall feed in shot burners through a manifold with screw in brass orifices sized for either natural gas or propane, as required by unit schedule. The flame controllers shall be solid state module that operates on 24 VAC.



It shall have a built in spark igniter and flame sensor with 100% gas shutoff. The pilot shall be ignited during each cycle of operation. After the pilot is proven, the main burner valve shall open. Pilot and main burners shall be extinguished during the off cycle. The thermal disc type high temperature limit switch shall shut off the main and pilot valves if an overheat condition occurs.

H. AIR-COOLED PACKAGED REFRIGERATION CONDENSING UNITS 1. Provide refrigeration systems complete with compressor(s), condenser

heat exchanger, and all controls and accessories required to regulate refrigerant pressure, flow rates and temperatures. The condensing unit is piped together with evaporator coil(s) and is sized and controlled to operate at all conditions required. Condensing units manufactured by a separate company and then mounted and piped on a single skid are not acceptable. The refrigeration equipment shall be capable of operation

down to an ambient temperature of 45F.

2. Compressors are scroll type. Service Access shall be provided around the entire compressor for maintenance. Each compressor shall have its own refrigeration circuit and expansion valve. Tandem compressors sets are not acceptable.

3. Condenser heat exchanger shall be sized to reject the heat absorbed by the evaporator coil and the work of compression at a low delta T relative to ambient to enhance efficiency. Coil circuiting shall provide for optimum performance with minimum pressure loss. Coil shall be round tube, plate-fin, or microchannel design. Coil shall be designed for 600 PSI working pressure and factory tested under water at 600 PSI air pressure.

4. Condenser fans shall be provided with fan guards both on the intake and discharge. Condensing unit section shall be accessed through access doors if compressors are located in condensing section, or access panels if compressors are located elsewhere. Condenser coils shall either be angled or be provided with exterior coil guards to prevent damage.

I. The unit shall have microprocessor control. Microprocessor shall be capable of communicating with a building management system (BMS) through Modbus, Lonworks or BACnet protocol. Controls shall include the ability for the HCU to determine stages of heating, cooling and dehumidification required to maintain space conditions when an “enable” command is given via the BMS, or direct control via commands issued from the BMS. Provide rotation sensor to send a 24 volt signal to the DDC system if wheel rotation stops.

J. Provide full roof curb, 12” high.

PART 3 - EXECUTION



3.1 INSTALLATION

A. Install heat wheels so supply and exhaust airstreams flow in opposite directions and rotation is from exhaust side to purge section to supply side.

1. Install access doors in both supply and exhaust ducts, both upstream and downstream, for access to wheel surfaces, drive motor, and seals.

2. Install removable panels or access doors between supply and exhaust ducts on building side for bypass during startup.

B. Install roof-mounted units on 12-inch high roof curb provided by manufacturer.

C. Install units with clearances for service and maintenance.

D. Install new filters at completion of equipment installation and before testing, adjusting, and balancing.

E. Pipe drains from units and drain pans to nearest floor drain.

3.2 CONNECTIONS


B. Install piping adjacent to machine to allow service and maintenance.

C. Duct and fan installation requirements are specified in other Division 15 Sections. Drawings indicate general arrangement of ducts, fittings, and specialties.

D. Ground equipment according to Division 26 Section "Grounding and Bonding."

E. Tighten electrical connectors and terminals according to manufacturer's published torque-tightening values. If manufacturer's torque values are not indicated, use those specified in UL 486A and UL 486B.


A. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect field-assembled components and equipment installation, including piping and electrical connections. Report results in writing.

1. Operational Test: After electrical circuitry has been energized, start units to confirm proper motor rotation and unit operation.

2. Adjust seals and purge.



3. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

4. Set initial temperature and humidity set points. 5. Set field-adjustable switches and circuit-breaker trip ranges as indicated.

B. Remove malfunctioning units, replace with new units, and retest as specified above.

3.4 DEMONSTRATION

A. Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain units. Refer to Division 1 Section "Closeout Procedures” and “Demonstration and Training".


PACKAGED OUTDOOR CENTRAL AIR HANDLING UNITS 237413 - 1 East Fairmont Middle School

SECTION 237413 – PACKAGED OUTDOOR CENTRAL AIR HANDLING UNITS

PART 1 - GENERAL



1.2 SUMMARY

A. This Section includes packaged air conditioners with gas heat.

1.3 SUBMITTALS

A. Product Data: Include manufacturer's technical data for each model indicated, including rated capacities, dimensions, required clearances, characteristics, furnished specialties, and accessories. Include product data for filters.

B. Shop Drawings: Detail equipment assemblies and indicate dimensions, weights, loads, required clearances, method of field assembly, components, and location and size of each field connection.

1. Wiring Diagrams: Power, signal, and control wiring. 2. Dimensioned Outline Drawings of Equipment Unit: Identify center of

gravity and locate and describe mounting and anchorage provisions.

C. Field quality-control test reports.

D. Operation and Maintenance Data: For rooftop air conditioners to include in emergency, operation, and maintenance manuals.

E. Warranties: Special warranties specified in this Section.


A. Product Options: Drawings indicate size, profiles, and dimensional requirements of rooftop air conditioners and are based on the specific system indicated. Refer to Division 1 Section "Product Requirements."

B. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.


C. Fabricate and label refrigeration system to comply with ASHRAE 15, "Safety Code for Mechanical Refrigeration."

D. Energy-Efficiency Ratio: Equal to or greater than prescribed by ASHRAE 90.1, "Energy Efficient Design of New Buildings except Low-Rise Residential Buildings."

E. Coefficient of Performance: Equal to or greater than prescribed by ASHRAE 90.1, "Energy Efficient Design of New Buildings except Low-Rise Residential Buildings."

F. Comply with NFPA 54 for gas-fired furnace section.

G. ARI Certification: Units shall be ARI certified and listed.

H. ARI Compliance for Units with Capacities Less Than 135,000 Btuh (39.6 kW): Rate rooftop air-conditioner capacity according to ARI 210/240, "Unitary Air-Conditioning and Air-Source Heat Pump Equipment."

1. Sound Power Level Ratings: Comply with ARI 270, "Sound Rating of Outdoor Unitary Equipment."

I. ARI Compliance for Units with Capacities 135,000 Btuh (39.6 kW) and More: Rate rooftop air-conditioner capacity according to ARI 340/360, "Commercial and Industrial Unitary Air-Conditioning and Heat Pump Equipment."

1. Sound Power Level Ratings: Comply with ARI 270, "Sound Rating of Outdoor Unitary Equipment."

1.5 COORDINATION

A. Coordinate size and location of roof curbs.

1.6 WARRANTY

A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to replace components of rooftop air conditioners that fail in materials or workmanship within specified warranty period.

1. Warranty Period for Compressors: Manufacturer's standard, but not less than five years from date of Substantial Completion.

2. Warranty Period for Heat Exchangers: Manufacturer's standard, but not less than five years from date of Substantial Completion.

3. Warranty Period for Solid-State Ignition Modules: Manufacturer's standard, but not less than three years from date of Substantial Completion.


4. Warranty Period for Control Boards: Manufacturer's standard, but not less than three years from date of Substantial Completion.

1.7 EXTRA MATERIALS

A. Furnish extra materials described below that match products installed and that are packaged with protective covering for storage and identified with labels describing contents.

1. Fan Belts: One set for each belt-drive fan. 2. Filters: One set of filters for each unit.

PART 2 - PRODUCTS

2.1 PACKAGED HVAC UNITS

A. Manufacturers: Approved manufacturers include but are not necessarily limited to the following

1. Carrier Corporation. 2. Trane Company (The); North American Commercial Group. 3. York Industries 4. AAON

B. Description: Factory assembled and tested; designed for exterior installation; consisting of compressor, indoor and outside refrigerant coils, indoor fan and outside coil fan, refrigeration and temperature controls, filters, and dampers.

C. Casing: Galvanized-steel construction with enamel paint finish, removable panels or access doors with neoprene gaskets for inspection and access to internal parts, minimum 1/2-inch- thick thermal insulation, knockouts for electrical and piping connections, exterior condensate drain connection, and lifting lugs. Cabinet insulation shall have a non-porous facing on the side exposed to the airstream. Drain pan shall be sloped from all directions to the drain and the drain pipe shall be flush with the bottom of the drain pan.

D. Indoor Fan: Forward curved, centrifugal, belt driven with adjustable motor sheaves, grease-lubricated ball bearings, and motor.

E. Outside Coil Fan: Propeller type, directly driven by permanently lubricated motor.

F. Refrigerant Coils: Aluminum-plate fin and seamless copper tube in steel casing with equalizing-type vertical distributor.


G. Compressor(s): Hermetic reciprocating or scroll compressors with integral vibration isolators, internal overcurrent and overtemperature protection, internal pressure relief, and crankcase heaters

H. Refrigeration System:

1. Compressor(s). 2. Outside coil and fan. 3. Indoor coil and fan. 4. Check valves. 5. Expansion valves with replaceable thermostatic elements. 6. Refrigerant dryers. 7. High-pressure switches. 8. Low-pressure switches. 9. Thermostats for coil freeze-up protection during low-ambient temperature

operation or loss of air. 10. Independent refrigerant circuits. (Two) 11. Brass service valves installed in discharge and liquid lines. 12. Charge of refrigerant. 13. Refrigerant: R-410a 14. Timed Off Control: Automatic-reset control shuts compressor off after five

minutes.

I. Filters: 2-inch- (50-mm-) thick, fiberglass, pleated, throwaway filters in filter rack, having efficiency of 25% Ashrae Dust Spot (MERV Eleven), in accordance with ASHRAE Test Standard 52.1 and 52.2.

J. Heat Exchanger: Aluminized-steel construction for natural-gas-fired burners with the following controls:

1. Redundant dual gas valve with manual shutoff. 2. Direct-spark pilot ignition. 3. Electronic flame sensor. 4. Induced-draft blower. 5. Flame rollout switch.

K. Economizer: Return- and outside-air dampers with neoprene seals, outside-air filter, and hood.

1. Damper Motor: Fully modulating spring return with adjustable minimum position.

2. Control: Electronic-control system uses mixed-air temperature and selects between outside-air and return-air enthalpy to adjust mixing dampers.

3. Relief Damper: Gravity actuated with bird screen and hood.


L. Power Connection: Provide for single connection of power to unit with unit-mounted disconnect switch accessible from outside unit. Provide control-circuit transformer with built-in circuit breaker.

M. Unit Controls: Solid-state control board and components contain at least the following features:

1. Indoor fan on/off delay. 2. Default control to ensure proper operation after power interruption. 3. Service relay output. 4. Unit diagnostics and diagnostic code storage. 5. Field-adjustable control parameters. 6. Defrost control. 7. Economizer control. 8. Gas valve delay between first- and second-stage firing. 9. Minimum run time. 10. Night setback mode. 11. Low-refrigerant pressure control.

N. Thermostat: Specified in Division 23 Section "Automatic Temperature Control Systems."

O. Optional Accessories:

1. Service Outlets: 115-V, ground-fault, circuit-interrupter type, non-powered.

2. Dirty-filter switch. 3. Coil guards of painted, galvanized-steel wire 4. Vertical vent extension.

P. Communication Interface: factory installed to provide communication with the DDC control system.

2.2 MOTORS

A. Motor Sizes: Minimum size as indicated; if not indicated, large enough so driven load will not require motor to operate in service factor range above 1.0.

B. Controllers, electrical devices, and wiring are specified in Division 26 Sections.

PART 3 - EXECUTION

3.1 INSTALLATION


A. Install units level and plumb, maintaining manufacturer's recommended clearances.

B. Unit Support: Install unit level on roof.

3.2 CONNECTIONS


B. Install piping adjacent to machine to allow service and maintenance.

1. Gas Piping: Comply with applicable requirements in Division 23 Section "Fuel Gas Piping." Connect gas piping to burner, full size of gas train inlet, and connect with union and shutoff valve with sufficient clearance for burner removal and service.

C. Duct installation requirements are specified in other Division 23 Sections. Drawings indicate the general arrangement of ducts.

D. Electrical System Connections: Comply with applicable requirements in Division 26 Sections for power wiring, switches, and motor controls.

E. Ground equipment according to Division 16 Section "Grounding and Bonding."

F. Tighten electrical connectors and terminals according to manufacturer's published torque-tightening values. If manufacturer's torque values are not indicated, use those specified in UL 486A and UL 486B.


A. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect, test, and adjust field-assembled components and equipment installation.

B. Perform the following field quality-control tests and inspections and prepare test reports:

1. After installing rooftop air conditioners and after electrical circuitry has been energized, test units for compliance with requirements.

2. Inspect for and remove shipping bolts, blocks, and tie-down straps. 3. Operational Test: After electrical circuitry has been energized, start units

to confirm proper motor rotation and unit operation. 4. Test and adjust controls and safeties. Replace damaged and

malfunctioning controls and equipment.


C. Remove malfunctioning units, replace with new units, and retest as specified above.

3.4 STARTUP SERVICE

A. Engage a factory-authorized service representative to perform startup service.

B. Complete installation and startup checks according to manufacturer's written.

3.5 ADJUSTING

A. Adjust initial temperature and humidity set points.

B. Set field-adjustable switches and circuit-breaker trip ranges as indicated.

C. Occupancy Adjustments: When requested within 12 months of date of Substantial Completion, provide on-site assistance in adjusting system to suit actual occupied conditions. Provide up to two visits to site outside normal occupancy hours for this purpose, without additional cost.

3.6 DEMONSTRATION

A. Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain rooftop air conditioners.

B. Refer to Division 1 Section "Demonstration and Training."


VARIABLE REFRIGERANT FLOW HVAC SYSTEMS 238126 - 1 East Fairmont Middle School

SECTION 238126 – VARIABLE REFRIGERANT FLOW HVAC SYSTEM

PART 1 - GENERAL

1.1 SUMMARY

A. Section includes variable refrigerant flow HVAC system consisting of evaporator-fan units, heat recovery condenser units, piping accessories and controls.

B. System shall provide simultaneous heating and cooling to different room units connected to a condensing unit.

1.2 ACTION SUBMITTALS


1.3 INFORMATIONAL SUBMITTALS

A. Warranty: Sample of special warranty.

1.4 CLOSEOUT SUBMITTALS

A. Operation and maintenance data.


A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.

B. ASHRAE Compliance:

1. Fabricate and label refrigeration system to comply with ASHRAE 15, "Safety Standard for Refrigeration Systems."

2. ASHRAE Compliance: Applicable requirements in ASHRAE 62.1, Section 4 - "Outdoor Air Quality," Section 5 - "Systems and Equipment," Section 6 - " Procedures," and Section 7 - "Construction and System Start-up."

C. ASHRAE/IESNA Compliance: Applicable requirements in ASHRAE/IESNA 90.1.


1.6 WARRANTY

A. Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or replace components of split-system air-conditioning units that fail in materials or workmanship within specified warranty period.

1. Warranty Period:

a. For Compressor: Five year(s) from date of Substantial Completion. b. For Parts: Five year(s) from date of Substantial Completion. c. For Labor: Five year(s) from date of Substantial Completion.

PART 2 - PRODUCTS

2.1 MANUFACTURERS

A. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

1. Carrier Corporation 2. Daikin AC 3. Friedrich Air Conditioning Company. 4. Lennox International Inc. 5. Mitsubishi. 6. SANYO North America Corporation; SANYO Fisher Company. 7. Trane; a business of American Standard companies. 8. YORK; a Johnson Controls company.

2.2 INDOOR UNITS

A. Indoor units shall be factory assembled, wired and run tested. Units shall include wiring, piping, control circuit board, fan, motor and heat exchange coil. Units shall have self-diagnostic function, time delay function, autorestart function, emergency operation function and test-run switch. Units shall be charged with dry air when shipped from factory.

B. Ceiling-Mounted, Evaporator-Fan Components:

1. Cabinet: steel with removable panels. 2. Faceplate: For flush mounting on ceiling, with supply louvers and return

grille, with off-white finish. 3. Refrigerant Coil: Copper tube, with mechanically bonded aluminum fins

and electronic expansion valve. 4. Fan: Direct drive, double inlet centrifugal, forward curved.


5. Fan Motors: Two-speed, statically and dynamically balanced at the factory, with permanently lubricated bearings.

6. Motorized air sweep louver shall provide an automatic change in air flow by directing the air from side to side for uniform distribution.

C. Wall-Mounted, Evaporator-Fan Components:

1. Cabinet: constructed of foamed polystyrene with polyethylene insulation. 2. Grille: Adjustable throw supply and return grille, with off-white finish. 3. Refrigerant Coil: Copper tube, with mechanically bonded aluminum fins

and electronic expansion valve. 4. Fan: Direct drive, double inlet centrifugal, forward curved.

5. Fan Motors: Two-speed, statically and dynamically balanced at the factory, with permanently lubricated bearings.

6. Motorized air sweep louver shall provide an automatic change in air flow by directing the air from side to side for uniform distribution.

D. Air Filtration: Disposable Panel Filters, 30% efficient.

E. Provide condensate drain pan and drain with integral condensate pump.

2.3 HEAT RECOVERY CONDENSING UNITS

A. Unit shall be factory assembled and prewired with all necessary electronic and refrigerant controls. The cabinet shall be constructed of steel with baked enamel finish and shall be weatherproof.

B. The refrigerant circuit of the condensing unit shall consist of scroll compressors, motors, fans, condenser coil, electronic expansion valves, solenoid valves, four-way valve, distribution headers, capillaries, filters, shutoff valves, oil separators, service ports, liquid receivers and liquid accumulator. Refrigerant circuit shall have intelligent oil management system.

C. Safety devices shall include high pressure switch, control circuit fuses, crankcase heaters, fusible plug, overload relay, inverter overload protector, thermal protectors for fan and compressor motors, overcurrent protection for inverter, and anti-recycling timers.

D. Cooling circuits shall be provided with sub-cooling feature to prevent flashing of liquid refrigerant in fan-coil circuits. Units shall have oil recovery cycle commencing two hours after start of operation and then every 8 hours thereafter.


E. Casing shall be steel, finished with baked enamel, with removable panels for access to controls, weep holes for water drainage, and mounting holes in base. Provide brass service valves, fittings, and gage ports on exterior of casing.

F. Compressors shall be hermetically sealed scroll type with crankcase heater and mounted on vibration isolation device. Compressor motor with inverter speed control on 50% of compressors in condensing unit shall be provided. The inverter driven compressor in each condensing unit shall have digitally commutating speed control.

G. Refrigerant Charge: R-410A. Comply with ARI 210/240.

H. The condensing unit shall have one or more vertical discharge propeller type fans, with direct drive fan motors with speed controlled by digitally commutating inverter. The fan shall have inherent protection and shall have permanently lubricated bearings. Fans shall have guard to prevent contact with moving parts.

I. The condenser coil shall be manufactured from copper tubes expanded into aluminum fins to form a mechanical bond. The fins shall be coated with anti-corrosion acrylic resin. The heat exchanger coil shall be a waffle type louver fin with rifled bore tube design.

J. Units shall be capable of low ambient heating operation down to 0 deg F.

K. Capacity control range shall be 7% to 100%.

2.4 CONTROLS

A. Provide integrated control system for each condensing unit to provided communication with condensing units and associated branch selector boxes and indoor units. It shall be operated through a personal computer workstation and shall provide for remote monitoring and control over the internet and have an email alarm function.

B. Each indoor unit shall have be provided with an electronic room controller, wall mounted and hard wired. The unit shall include seven-day programmable scheduling, automatic heating/cooling changeover, and temperature setpoint adjustment with range restrictions

C. The integrated control system shall be designed to provide for connecting the VRF system to a DDC control system provided by another manufacturer.

D. The conductors between components of VRF system shall be 16 VDC non-shielded two conductor cable.


2.5 BRANCH SELECTOR BOXES

A. Units shall have galvanized steel plate casing.

B. Branch selector boxes shall include multiple refrigerant control valves, refrigerant control piping and electronic controls to provide communication between the box and the main processor and the box and the indoor units it serves.

C. The box shall control the mode of the indoor units it serves.

D. Boxes shall be factory assembled, wired and piped and run-tested at the factory.

2.6 ELECTRICAL

A. Multiple condensing units in a single package shall have a common controller.

B. Each condensing unit in a single package shall have a separate power feed.

2.7 ACCESSORIES

A. Refrigerant Line branch fitting with flared fittings at both ends.

B. Condensate pumps and hoses.

C. Provide hail guards on condensing unit coils.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install units level and plumb.

B. Install evaporator-fan components using manufacturer's standard mounting devices securely fastened to building structure.

C. Install compressor-condenser components on prefab structural rails.

D. Install and connect refrigerant tubing to components. Install tubing to allow access to unit.


E. High/low pressure gas line, liquid line and suction line shall be individually insulated between the outdoor and indoor units.

F. Provide new replacement filters after system startup.

3.2 CONNECTIONS

A. Piping support requirements are specified in other Division 23 Sections. Drawings indicate general arrangement of piping, fittings, and specialties.

B. Where piping is installed adjacent to unit, allow space for service and maintenance of unit.


A. Perform tests and inspections.

1. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect components, assemblies, and equipment installations, including connections, and to assist in testing.

B. Tests and Inspections:

1. Leak Test: After installation, charge system and test for leaks. Repair leaks and retest until no leaks exist.


3. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

C. Remove and replace malfunctioning units and retest as specified above.

D. Prepare test and inspection reports.

3.4 DEMONSTRATION

A. Train Owner's maintenance personnel to adjust, operate, and maintain units.


UNIT HEATERS 238239 - 1 East Fairmont Middle School

SECTION 238239 - UNIT HEATERS

PART 1 - GENERAL

1.1 SUMMARY


1. Wall heaters with propeller fans and electric-resistance heating coils.

1.2 SUBMITTALS

A. Product Data: Include rated capacities, operating characteristics, furnished specialties, and accessories for each product indicated.

B. Field quality-control test reports.

C. Operation and maintenance data.



PART 2 - PRODUCTS

2.1 WALL HEATERS


1. Berko Electric Heating; a division of Marley Engineered Products. 2. Chromalox, Inc.; a division of Emerson Electric Company. 3. Indeeco. 4. Markel Products; a division of TPI Corporation. 5. Marley Electric Heating; a division of Marley Engineered Products. 6. Ouellet Canada Inc. 7. QMark Electric Heating; a division of Marley Engineered Products. 8. Trane. 9. Approved equal of other manufacturer.


B. Description: An assembly including chassis, electric heating coil, fan, motor, and controls. Comply with UL 2021.

C. Cabinet:

1. Front Panel: Extruded-aluminum bar grille, with removable panels fastened with tamperproof fasteners.

2. Finish: Baked enamel over baked-on primer with manufacturer's standard color selected by Architect, applied to factory-assembled and -tested wall and ceiling heaters before shipping.

3. Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in ASHRAE 62.1-2004.

D. Surface-Mounting Cabinet Enclosure: Steel with finish to match cabinet.

E. Electric-Resistance Heating Coil: Nickel-chromium heating wire, free from expansion noise and hum, embedded in magnesium oxide refractory and sealed in corrosion-resistant metallic sheath. Terminate elements in stainless-steel, machine-staked terminals secured with stainless-steel hardware, and limit controls for high temperature protection.

F. Fan: Aluminum propeller directly connected to motor.

G. Controls: Unit-mounted thermostat

H. Electrical Connection: Factory wire motors and controls for a single field connection with disconnect switch.

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install unit heaters to comply with NFPA 90A.

B. Ground equipment according to Division 26 Section "Grounding and Bonding for Electrical Systems."

C. Connect wiring according to Division 26 Section "Low-Voltage Electrical Power Conductors and Cables."


A. Perform the following field tests and inspections and prepare test reports:



2. Operate electric heating elements through each stage to verify proper operation and electrical connections.

3. Test and adjust controls and safety devices. Replace damaged and malfunctioning controls and equipment.

B. Remove and replace malfunctioning units and retest as specified above.

3.3 DEMONSTRATION



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